Company Quick10K Filing
S&T Bancorp
Price36.82 EPS2
Shares34 P/E17
MCap1,264 P/FCF14
Net Debt-59 EBIT167
TEV1,205 TEV/EBIT7
TTM 2019-09-30, in MM, except price, ratios
10-Q 2021-03-31 Filed 2021-05-06
10-K 2020-12-31 Filed 2021-03-01
10-Q 2020-09-30 Filed 2020-11-05
10-Q 2020-06-30 Filed 2020-08-06
10-Q 2020-03-31 Filed 2020-05-11
10-K 2019-12-31 Filed 2020-03-02
10-Q 2019-09-30 Filed 2019-10-31
10-Q 2019-06-30 Filed 2019-08-01
10-Q 2019-03-31 Filed 2019-05-01
10-K 2018-12-31 Filed 2019-02-21
10-Q 2018-09-30 Filed 2018-11-01
10-Q 2018-06-30 Filed 2018-08-01
10-Q 2018-03-31 Filed 2018-05-04
10-K 2017-12-31 Filed 2018-03-01
10-Q 2017-09-30 Filed 2017-11-02
10-Q 2017-06-30 Filed 2017-08-02
10-Q 2017-03-31 Filed 2017-05-04
10-K 2016-12-31 Filed 2017-02-24
10-Q 2016-09-30 Filed 2016-11-02
10-Q 2016-06-30 Filed 2016-08-03
10-Q 2016-03-31 Filed 2016-05-04
10-K 2015-12-31 Filed 2016-02-23
10-Q 2015-09-30 Filed 2015-11-03
10-Q 2015-06-30 Filed 2015-08-05
10-Q 2015-03-31 Filed 2015-05-06
10-K 2014-12-31 Filed 2015-02-23
10-Q 2014-09-30 Filed 2014-11-05
10-Q 2014-06-30 Filed 2014-08-07
10-Q 2014-03-31 Filed 2014-05-07
10-K 2013-12-31 Filed 2014-02-21
10-Q 2013-09-30 Filed 2013-10-31
10-Q 2013-06-30 Filed 2013-08-01
10-Q 2013-03-31 Filed 2013-05-01
10-K 2012-12-31 Filed 2013-02-25
10-Q 2012-09-30 Filed 2012-11-02
10-Q 2012-06-30 Filed 2012-08-02
10-Q 2012-03-31 Filed 2012-05-10
10-K 2011-12-31 Filed 2012-02-29
10-Q 2011-09-30 Filed 2011-11-04
10-Q 2011-06-30 Filed 2011-08-05
10-Q 2011-03-31 Filed 2011-05-06
10-K 2010-12-31 Filed 2011-03-16
10-Q 2010-09-30 Filed 2010-11-05
10-Q 2010-06-30 Filed 2010-08-05
10-Q 2010-03-31 Filed 2010-05-06
10-K 2009-12-31 Filed 2010-02-26
8-K 2020-11-16
8-K 2020-10-19
8-K 2020-10-12
8-K 2020-10-02
8-K 2020-09-09
8-K 2020-07-27
8-K 2020-07-14
8-K 2020-05-26
8-K 2020-05-18
8-K 2020-05-18
8-K 2020-05-06
8-K 2020-04-29
8-K 2020-02-12
8-K 2020-01-27
8-K 2019-11-30
8-K 2019-11-04
8-K 2019-10-21
8-K 2019-10-21
8-K 2019-09-17
8-K 2019-09-05
8-K 2019-09-03
8-K 2019-07-18
8-K 2019-07-15
8-K 2019-06-05
8-K 2019-05-21
8-K 2019-05-20
8-K 2019-05-17
8-K 2019-05-06
8-K 2019-05-06
8-K 2019-04-18
8-K 2019-02-12
8-K 2019-01-31
8-K 2019-01-30
8-K 2019-01-07
8-K 2018-12-07
8-K 2018-11-13
8-K 2018-10-18
8-K 2018-08-15
8-K 2018-08-01
8-K 2018-07-19
8-K 2018-06-07
8-K 2018-06-01
8-K 2018-05-24
8-K 2018-05-22
8-K 2018-05-21
8-K 2018-05-08
8-K 2018-04-16
8-K 2018-03-22
8-K 2018-02-07
8-K 2018-02-06
8-K 2018-01-22
8-K 2018-01-12

STBA 10Q Quarterly Report

Note 1. Basis of Presentation
Note 2. Earnings per Share
Note 3. Fair Value Measurements
Note 4. Securities
Note 5. Loans and Loans Held for Sale
Note 6. Allowance for Credit Losses
Note 7. Derivative Instruments and Hedging Activities
Note 8. Commitments and Contingencies
Note 9. Other Comprehensive Income (Loss)
Note 10. Employee Benefits
Note 11. Share Repurchase Plan
Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations
Item 3. Quantitative and Qualitative Disclosures About Market Risk
Item 4. Controls and Procedures
Part II
Item 1. Legal Proceedings
Item 1A. Risk Factors
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds
Item 3. Defaults Upon Senior Securities
Item 4. Mine Safety Disclosures
Item 5. Other Information
Item 6. Exhibits
EX-10.1 confidentialitytradesecr.htm
EX-10.2 severanceagreementdateda.htm
EX-31.1 exhibit311q1-2021.htm
EX-31.2 exhibit312q1-2021.htm
EX-32 exhibit32q3-2021.htm

S&T Bancorp Earnings 2021-03-31

Balance SheetIncome StatementCash Flow

stba-20210331
false2021Q10000719220--12-31us-gaap:AccountingStandardsUpdate201613Memberus-gaap:AccountingStandardsUpdate201613Memberus-gaap:AccountingStandardsUpdate201613Member00007192202021-01-012021-03-31xbrli:shares00007192202021-04-30iso4217:USD00007192202021-03-3100007192202020-12-31iso4217:USDxbrli:shares00007192202020-01-012020-03-310000719220us-gaap:CreditAndDebitCardMember2021-01-012021-03-310000719220us-gaap:CreditAndDebitCardMember2020-01-012020-03-310000719220us-gaap:DepositAccountMember2021-01-012021-03-310000719220us-gaap:DepositAccountMember2020-01-012020-03-310000719220stba:WealthManagementMember2021-01-012021-03-310000719220stba:WealthManagementMember2020-01-012020-03-310000719220us-gaap:CommonStockMember2019-12-310000719220us-gaap:AdditionalPaidInCapitalMember2019-12-310000719220us-gaap:RetainedEarningsMember2019-12-310000719220us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-12-310000719220us-gaap:TreasuryStockMember2019-12-3100007192202019-12-310000719220us-gaap:RetainedEarningsMember2020-01-012020-03-310000719220us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-01-012020-03-3100007192202019-01-012019-12-310000719220srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:RetainedEarningsMember2019-12-310000719220srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2019-12-310000719220us-gaap:TreasuryStockMember2020-01-012020-03-310000719220us-gaap:AdditionalPaidInCapitalMember2020-01-012020-03-310000719220us-gaap:CommonStockMember2020-03-310000719220us-gaap:AdditionalPaidInCapitalMember2020-03-310000719220us-gaap:RetainedEarningsMember2020-03-310000719220us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-03-310000719220us-gaap:TreasuryStockMember2020-03-3100007192202020-03-310000719220us-gaap:CommonStockMember2020-12-310000719220us-gaap:AdditionalPaidInCapitalMember2020-12-310000719220us-gaap:RetainedEarningsMember2020-12-310000719220us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-12-310000719220us-gaap:TreasuryStockMember2020-12-310000719220us-gaap:RetainedEarningsMember2021-01-012021-03-310000719220us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-01-012021-03-310000719220us-gaap:TreasuryStockMember2021-01-012021-03-310000719220us-gaap:AdditionalPaidInCapitalMember2021-01-012021-03-310000719220us-gaap:CommonStockMember2021-03-310000719220us-gaap:AdditionalPaidInCapitalMember2021-03-310000719220us-gaap:RetainedEarningsMember2021-03-310000719220us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-03-310000719220us-gaap:TreasuryStockMember2021-03-310000719220us-gaap:RestrictedStockMember2021-01-012021-03-310000719220us-gaap:RestrictedStockMember2020-01-012020-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasurySecuritiesMemberus-gaap:FairValueInputsLevel1Member2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:USTreasurySecuritiesMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasurySecuritiesMemberus-gaap:FairValueInputsLevel3Member2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasurySecuritiesMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:USGovernmentCorporationsAndAgenciesSecuritiesMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:USGovernmentCorporationsAndAgenciesSecuritiesMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:USGovernmentCorporationsAndAgenciesSecuritiesMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentCorporationsAndAgenciesSecuritiesMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedMortgageObligationsMemberus-gaap:FairValueInputsLevel1Member2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedMortgageObligationsMemberus-gaap:FairValueInputsLevel2Member2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedMortgageObligationsMemberus-gaap:FairValueInputsLevel3Member2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedMortgageObligationsMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Member2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Member2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:CommercialMortgageBackedSecuritiesMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CommercialMortgageBackedSecuritiesMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialMortgageBackedSecuritiesMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateBondSecuritiesMemberus-gaap:FairValueInputsLevel1Member2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CorporateBondSecuritiesMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateBondSecuritiesMemberus-gaap:FairValueInputsLevel3Member2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateBondSecuritiesMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel1Member2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Member2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateSwapMemberus-gaap:FairValueInputsLevel1Member2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:InterestRateSwapMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateSwapMemberus-gaap:FairValueInputsLevel3Member2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateSwapMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:InterestRateLockCommitmentsMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:InterestRateLockCommitmentsMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateLockCommitmentsMember2021-03-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateLockCommitmentsMember2021-03-310000719220us-gaap:ForwardContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-12-310000719220us-gaap:ForwardContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Member2020-12-310000719220us-gaap:ForwardContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-12-310000719220us-gaap:ForwardContractsMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasurySecuritiesMemberus-gaap:FairValueInputsLevel1Member2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:USTreasurySecuritiesMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasurySecuritiesMemberus-gaap:FairValueInputsLevel3Member2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasurySecuritiesMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:USGovernmentCorporationsAndAgenciesSecuritiesMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:USGovernmentCorporationsAndAgenciesSecuritiesMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:USGovernmentCorporationsAndAgenciesSecuritiesMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USGovernmentCorporationsAndAgenciesSecuritiesMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedMortgageObligationsMemberus-gaap:FairValueInputsLevel1Member2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedMortgageObligationsMemberus-gaap:FairValueInputsLevel2Member2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedMortgageObligationsMemberus-gaap:FairValueInputsLevel3Member2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedMortgageObligationsMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Member2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Member2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:CommercialMortgageBackedSecuritiesMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CommercialMortgageBackedSecuritiesMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialMortgageBackedSecuritiesMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateBondSecuritiesMemberus-gaap:FairValueInputsLevel1Member2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CorporateBondSecuritiesMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateBondSecuritiesMemberus-gaap:FairValueInputsLevel3Member2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateBondSecuritiesMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel1Member2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Member2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Member2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateSwapMemberus-gaap:FairValueInputsLevel1Member2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:InterestRateSwapMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateSwapMemberus-gaap:FairValueInputsLevel3Member2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateSwapMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel1Memberus-gaap:InterestRateLockCommitmentsMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel2Memberus-gaap:InterestRateLockCommitmentsMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateLockCommitmentsMember2020-12-310000719220us-gaap:FairValueMeasurementsRecurringMemberus-gaap:InterestRateLockCommitmentsMember2020-12-310000719220us-gaap:FairValueMeasurementsNonrecurringMember2020-12-310000719220us-gaap:FairValueMeasurementsNonrecurringMember2021-03-310000719220stba:ValuationTechniqueCollateralMethodMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-31xbrli:pure0000719220srt:MinimumMemberstba:ValuationTechniqueCollateralMethodMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MeasurementInputAppraisedValueMember2021-03-310000719220srt:MaximumMemberstba:ValuationTechniqueCollateralMethodMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MeasurementInputAppraisedValueMember2021-03-310000719220stba:ValuationTechniqueCollateralMethodMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MeasurementInputAppraisedValueMembersrt:WeightedAverageMember2021-03-310000719220us-gaap:MeasurementInputCostToSellMembersrt:MinimumMemberstba:ValuationTechniqueCollateralMethodMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310000719220us-gaap:MeasurementInputCostToSellMembersrt:MaximumMemberstba:ValuationTechniqueCollateralMethodMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310000719220us-gaap:MeasurementInputCostToSellMemberstba:ValuationTechniqueCollateralMethodMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMember2021-03-310000719220us-gaap:ValuationTechniqueDiscountedCashFlowMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310000719220us-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310000719220srt:MaximumMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310000719220us-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMember2021-03-310000719220us-gaap:MeasurementInputConstantPrepaymentRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310000719220srt:MaximumMemberus-gaap:MeasurementInputConstantPrepaymentRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310000719220us-gaap:MeasurementInputConstantPrepaymentRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMember2021-03-310000719220stba:ValuationTechniqueContractualAgreementMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310000719220us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-03-310000719220stba:ValuationTechniqueCollateralMethodMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310000719220srt:MinimumMemberstba:ValuationTechniqueCollateralMethodMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MeasurementInputAppraisedValueMember2020-12-310000719220srt:MaximumMemberstba:ValuationTechniqueCollateralMethodMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MeasurementInputAppraisedValueMember2020-12-310000719220stba:ValuationTechniqueCollateralMethodMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MeasurementInputAppraisedValueMembersrt:WeightedAverageMember2020-12-310000719220us-gaap:MeasurementInputCostToSellMembersrt:MinimumMemberstba:ValuationTechniqueCollateralMethodMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310000719220us-gaap:MeasurementInputCostToSellMembersrt:MaximumMemberstba:ValuationTechniqueCollateralMethodMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310000719220us-gaap:MeasurementInputCostToSellMemberstba:ValuationTechniqueCollateralMethodMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMember2020-12-310000719220us-gaap:ValuationTechniqueDiscountedCashFlowMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310000719220us-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310000719220srt:MaximumMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310000719220us-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMember2020-12-310000719220us-gaap:MeasurementInputConstantPrepaymentRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310000719220srt:MaximumMemberus-gaap:MeasurementInputConstantPrepaymentRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310000719220us-gaap:MeasurementInputConstantPrepaymentRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMember2020-12-310000719220stba:ValuationTechniqueContractualAgreementMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310000719220us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310000719220us-gaap:CarryingReportedAmountFairValueDisclosureMember2021-03-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel1Member2021-03-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel2Member2021-03-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2021-03-310000719220us-gaap:InterestRateSwapMemberus-gaap:CarryingReportedAmountFairValueDisclosureMember2021-03-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:InterestRateSwapMember2021-03-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:InterestRateSwapMemberus-gaap:FairValueInputsLevel1Member2021-03-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel2Memberus-gaap:InterestRateSwapMember2021-03-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:InterestRateSwapMemberus-gaap:FairValueInputsLevel3Member2021-03-310000719220us-gaap:InterestRateLockCommitmentsMemberus-gaap:CarryingReportedAmountFairValueDisclosureMember2021-03-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:InterestRateLockCommitmentsMember2021-03-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel1Memberus-gaap:InterestRateLockCommitmentsMember2021-03-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel2Memberus-gaap:InterestRateLockCommitmentsMember2021-03-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateLockCommitmentsMember2021-03-310000719220us-gaap:ForwardContractsMemberus-gaap:CarryingReportedAmountFairValueDisclosureMember2021-03-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:ForwardContractsMember2021-03-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:ForwardContractsMemberus-gaap:FairValueInputsLevel1Member2021-03-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:ForwardContractsMemberus-gaap:FairValueInputsLevel2Member2021-03-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:ForwardContractsMemberus-gaap:FairValueInputsLevel3Member2021-03-310000719220us-gaap:CarryingReportedAmountFairValueDisclosureMember2020-12-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMember2020-12-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel1Member2020-12-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel2Member2020-12-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2020-12-310000719220us-gaap:InterestRateSwapMemberus-gaap:CarryingReportedAmountFairValueDisclosureMember2020-12-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:InterestRateSwapMember2020-12-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:InterestRateSwapMemberus-gaap:FairValueInputsLevel1Member2020-12-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel2Memberus-gaap:InterestRateSwapMember2020-12-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:InterestRateSwapMemberus-gaap:FairValueInputsLevel3Member2020-12-310000719220us-gaap:InterestRateLockCommitmentsMemberus-gaap:CarryingReportedAmountFairValueDisclosureMember2020-12-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:InterestRateLockCommitmentsMember2020-12-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel1Memberus-gaap:InterestRateLockCommitmentsMember2020-12-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel2Memberus-gaap:InterestRateLockCommitmentsMember2020-12-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateLockCommitmentsMember2020-12-310000719220us-gaap:ForwardContractsMemberus-gaap:CarryingReportedAmountFairValueDisclosureMember2020-12-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:ForwardContractsMember2020-12-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:ForwardContractsMemberus-gaap:FairValueInputsLevel1Member2020-12-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:ForwardContractsMemberus-gaap:FairValueInputsLevel2Member2020-12-310000719220us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:ForwardContractsMemberus-gaap:FairValueInputsLevel3Member2020-12-310000719220us-gaap:USTreasurySecuritiesMember2021-03-310000719220us-gaap:USTreasurySecuritiesMember2020-12-310000719220us-gaap:USGovernmentCorporationsAndAgenciesSecuritiesMember2021-03-310000719220us-gaap:USGovernmentCorporationsAndAgenciesSecuritiesMember2020-12-310000719220us-gaap:CollateralizedMortgageObligationsMember2021-03-310000719220us-gaap:CollateralizedMortgageObligationsMember2020-12-310000719220us-gaap:ResidentialMortgageBackedSecuritiesMember2021-03-310000719220us-gaap:ResidentialMortgageBackedSecuritiesMember2020-12-310000719220us-gaap:CommercialMortgageBackedSecuritiesMember2021-03-310000719220us-gaap:CommercialMortgageBackedSecuritiesMember2020-12-310000719220us-gaap:CorporateDebtSecuritiesMember2021-03-310000719220us-gaap:CorporateDebtSecuritiesMember2020-12-310000719220us-gaap:USStatesAndPoliticalSubdivisionsMember2021-03-310000719220us-gaap:USStatesAndPoliticalSubdivisionsMember2020-12-31stba:security0000719220us-gaap:CorporateBondSecuritiesMember2021-03-310000719220us-gaap:CorporateBondSecuritiesMember2020-12-3100007192202021-03-312021-03-3100007192202020-12-312020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialRealEstateIncludingBusinessBankingMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialRealEstateIncludingBusinessBankingMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialIncludingBusinessBankingMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialIncludingBusinessBankingMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:ConstructionLoansIncludingBusinessBankingMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:ConstructionLoansIncludingBusinessBankingMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMember2020-12-310000719220us-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateIncludingBusinessBankingMember2021-03-310000719220us-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateIncludingBusinessBankingMember2020-12-310000719220stba:OtherConsumerIncludingBusinessBankingMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310000719220stba:OtherConsumerIncludingBusinessBankingMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000719220us-gaap:ConsumerPortfolioSegmentMember2021-03-310000719220us-gaap:ConsumerPortfolioSegmentMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:PaycheckProtectionProgramLoanCARESActMember2021-03-310000719220stba:BusinessBankingPortfolioSegmentMember2021-03-310000719220stba:BusinessBankingPortfolioSegmentMember2020-12-310000719220us-gaap:CommercialRealEstateMemberstba:BusinessBankingPortfolioSegmentMember2021-03-310000719220stba:CommercialAndIndustrialMemberstba:BusinessBankingPortfolioSegmentMember2021-03-310000719220us-gaap:ConstructionLoansMemberstba:BusinessBankingPortfolioSegmentMember2021-03-310000719220us-gaap:ConsumerPortfolioSegmentMemberstba:BusinessBankingMember2021-03-310000719220us-gaap:CommercialRealEstateMemberstba:BusinessBankingPortfolioSegmentMember2020-12-310000719220stba:CommercialAndIndustrialMemberstba:BusinessBankingPortfolioSegmentMember2020-12-310000719220us-gaap:ConstructionLoansMemberstba:BusinessBankingPortfolioSegmentMember2020-12-310000719220us-gaap:ConsumerPortfolioSegmentMemberstba:BusinessBankingMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMember2021-01-012021-03-310000719220us-gaap:ConsumerPortfolioSegmentMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialRealEstateAndCommercialConstructionMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialRealEstateAndCommercialConstructionMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberus-gaap:CommercialRealEstateMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:NonperformingFinancingReceivableMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinanceReceivablesMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberstba:CommercialAndIndustrialMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMemberus-gaap:NonperformingFinancingReceivableMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMemberus-gaap:FinanceReceivablesMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberus-gaap:ConstructionLoansMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:NonperformingFinancingReceivableMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinanceReceivablesMemberus-gaap:ConstructionLoansMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberstba:BusinessBankingMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberstba:BusinessBankingMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinanceReceivablesMemberstba:BusinessBankingMember2021-01-012021-03-310000719220us-gaap:PerformingFinancingReceivableMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-01-012021-03-310000719220us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberstba:ConsumerRealEstateMember2021-01-012021-03-310000719220us-gaap:FinanceReceivablesMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-01-012021-03-310000719220us-gaap:PerformingFinancingReceivableMemberstba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2021-01-012021-03-310000719220stba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMember2021-01-012021-03-310000719220stba:OtherConsumerMemberus-gaap:FinanceReceivablesMemberus-gaap:ConsumerPortfolioSegmentMember2021-01-012021-03-310000719220us-gaap:PerformingFinancingReceivableMember2021-01-012021-03-310000719220us-gaap:NonperformingFinancingReceivableMember2021-01-012021-03-310000719220us-gaap:FinanceReceivablesMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberus-gaap:CommercialRealEstateMember2020-01-012020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:NonperformingFinancingReceivableMember2020-01-012020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinanceReceivablesMember2020-01-012020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberstba:CommercialAndIndustrialMember2020-01-012020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMemberus-gaap:NonperformingFinancingReceivableMember2020-01-012020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMemberus-gaap:FinanceReceivablesMember2020-01-012020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberus-gaap:ConstructionLoansMember2020-01-012020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:NonperformingFinancingReceivableMember2020-01-012020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinanceReceivablesMemberus-gaap:ConstructionLoansMember2020-01-012020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberstba:BusinessBankingMember2020-01-012020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberstba:BusinessBankingMember2020-01-012020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinanceReceivablesMemberstba:BusinessBankingMember2020-01-012020-12-310000719220us-gaap:PerformingFinancingReceivableMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-01-012020-12-310000719220us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberstba:ConsumerRealEstateMember2020-01-012020-12-310000719220us-gaap:FinanceReceivablesMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-01-012020-12-310000719220us-gaap:PerformingFinancingReceivableMemberstba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2020-01-012020-12-310000719220stba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMember2020-01-012020-12-310000719220stba:OtherConsumerMemberus-gaap:FinanceReceivablesMemberus-gaap:ConsumerPortfolioSegmentMember2020-01-012020-12-310000719220us-gaap:PerformingFinancingReceivableMember2020-01-012020-12-310000719220us-gaap:NonperformingFinancingReceivableMember2020-01-012020-12-310000719220us-gaap:FinanceReceivablesMember2020-01-012020-12-31stba:loan0000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberstba:BankruptcyMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberstba:LoanForbearanceMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:ExtendedMaturityMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:ModifyRateMemberus-gaap:CommercialRealEstateMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:ModifyPaymentsMemberus-gaap:CommercialRealEstateMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMemberstba:BankruptcyMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMemberstba:LoanForbearanceMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ExtendedMaturityMemberstba:CommercialAndIndustrialMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:ModifyRateMemberstba:CommercialAndIndustrialMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:ModifyPaymentsMemberstba:CommercialAndIndustrialMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BankruptcyMemberus-gaap:ConstructionLoansMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:LoanForbearanceMemberus-gaap:ConstructionLoansMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ExtendedMaturityMemberus-gaap:ConstructionLoansMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:ModifyRateMemberus-gaap:ConstructionLoansMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:ModifyPaymentsMemberus-gaap:ConstructionLoansMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BusinessBankingMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BankruptcyMemberstba:BusinessBankingMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:LoanForbearanceMemberstba:BusinessBankingMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ExtendedMaturityMemberstba:BusinessBankingMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:ModifyRateMemberstba:BusinessBankingMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:ModifyPaymentsMemberstba:BusinessBankingMember2021-01-012021-03-310000719220us-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-01-012021-03-310000719220stba:BankruptcyMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-01-012021-03-310000719220us-gaap:ConsumerPortfolioSegmentMemberstba:LoanForbearanceMemberstba:ConsumerRealEstateMember2021-01-012021-03-310000719220us-gaap:ExtendedMaturityMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-01-012021-03-310000719220stba:ModifyRateMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-01-012021-03-310000719220stba:ModifyPaymentsMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-01-012021-03-310000719220stba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2021-01-012021-03-310000719220stba:OtherConsumerMemberstba:BankruptcyMemberus-gaap:ConsumerPortfolioSegmentMember2021-01-012021-03-310000719220stba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMemberstba:LoanForbearanceMember2021-01-012021-03-310000719220stba:OtherConsumerMemberus-gaap:ExtendedMaturityMemberus-gaap:ConsumerPortfolioSegmentMember2021-01-012021-03-310000719220stba:ModifyRateMemberstba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2021-01-012021-03-310000719220stba:ModifyPaymentsMemberstba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2021-01-012021-03-310000719220stba:BankruptcyMember2021-01-012021-03-310000719220stba:LoanForbearanceMember2021-01-012021-03-310000719220us-gaap:ExtendedMaturityMember2021-01-012021-03-310000719220stba:ModifyRateMember2021-01-012021-03-310000719220stba:ModifyPaymentsMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberstba:BankruptcyMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberstba:LoanForbearanceMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:ExtendedMaturityMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:ModifyRateMemberus-gaap:CommercialRealEstateMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:ModifyPaymentsMemberus-gaap:CommercialRealEstateMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMemberstba:BankruptcyMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMemberstba:LoanForbearanceMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ExtendedMaturityMemberstba:CommercialAndIndustrialMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:ModifyRateMemberstba:CommercialAndIndustrialMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:ModifyPaymentsMemberstba:CommercialAndIndustrialMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BankruptcyMemberus-gaap:ConstructionLoansMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:LoanForbearanceMemberus-gaap:ConstructionLoansMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ExtendedMaturityMemberus-gaap:ConstructionLoansMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:ModifyRateMemberus-gaap:ConstructionLoansMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:ModifyPaymentsMemberus-gaap:ConstructionLoansMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BusinessBankingMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BankruptcyMemberstba:BusinessBankingMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:LoanForbearanceMemberstba:BusinessBankingMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ExtendedMaturityMemberstba:BusinessBankingMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:ModifyRateMemberstba:BusinessBankingMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:ModifyPaymentsMemberstba:BusinessBankingMember2020-01-012020-03-310000719220us-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-01-012020-03-310000719220stba:BankruptcyMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-01-012020-03-310000719220us-gaap:ConsumerPortfolioSegmentMemberstba:LoanForbearanceMemberstba:ConsumerRealEstateMember2020-01-012020-03-310000719220us-gaap:ExtendedMaturityMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-01-012020-03-310000719220stba:ModifyRateMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-01-012020-03-310000719220stba:ModifyPaymentsMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-01-012020-03-310000719220stba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2020-01-012020-03-310000719220stba:OtherConsumerMemberstba:BankruptcyMemberus-gaap:ConsumerPortfolioSegmentMember2020-01-012020-03-310000719220stba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMemberstba:LoanForbearanceMember2020-01-012020-03-310000719220stba:OtherConsumerMemberus-gaap:ExtendedMaturityMemberus-gaap:ConsumerPortfolioSegmentMember2020-01-012020-03-310000719220stba:ModifyRateMemberstba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2020-01-012020-03-310000719220stba:ModifyPaymentsMemberstba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2020-01-012020-03-310000719220stba:BankruptcyMember2020-01-012020-03-310000719220stba:LoanForbearanceMember2020-01-012020-03-310000719220us-gaap:ExtendedMaturityMember2020-01-012020-03-310000719220stba:ModifyRateMember2020-01-012020-03-310000719220stba:ModifyPaymentsMember2020-01-012020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:PaycheckProtectionProgramLoanCARESActMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:PaycheckProtectionProgramLoanCARESActMember2020-01-012020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMember2021-03-310000719220stba:PerformingFinancialInstrumentConvertedToNonperformingMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberstba:PerformingFinancialInstrumentConvertedToNonperformingMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:PerformingFinancialInstrumentConvertedToNonperformingMemberstba:CommercialAndIndustrialMember2021-01-012021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberus-gaap:CommercialRealEstateMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberus-gaap:CommercialRealEstateMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:SubstandardMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:DoubtfulMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberstba:CommercialAndIndustrialMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberstba:CommercialAndIndustrialMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberstba:CommercialAndIndustrialMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberstba:CommercialAndIndustrialMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberus-gaap:ConstructionLoansMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberus-gaap:ConstructionLoansMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberus-gaap:ConstructionLoansMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberus-gaap:ConstructionLoansMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberstba:BusinessBankingMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberstba:BusinessBankingMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberstba:BusinessBankingMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberstba:BusinessBankingMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BusinessBankingMember2021-03-310000719220us-gaap:PassMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-03-310000719220us-gaap:SpecialMentionMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-03-310000719220us-gaap:SubstandardMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-03-310000719220us-gaap:DoubtfulMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-03-310000719220us-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-03-310000719220us-gaap:PassMemberstba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310000719220us-gaap:SpecialMentionMemberstba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310000719220stba:OtherConsumerMemberus-gaap:SubstandardMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310000719220stba:OtherConsumerMemberus-gaap:DoubtfulMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310000719220stba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310000719220us-gaap:PassMember2021-03-310000719220us-gaap:SpecialMentionMember2021-03-310000719220us-gaap:SubstandardMember2021-03-310000719220us-gaap:DoubtfulMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberus-gaap:CommercialRealEstateMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberus-gaap:CommercialRealEstateMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:SubstandardMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:DoubtfulMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberstba:CommercialAndIndustrialMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberstba:CommercialAndIndustrialMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberstba:CommercialAndIndustrialMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberstba:CommercialAndIndustrialMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberus-gaap:ConstructionLoansMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberus-gaap:ConstructionLoansMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberus-gaap:ConstructionLoansMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberus-gaap:ConstructionLoansMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberstba:BusinessBankingMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMemberstba:BusinessBankingMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberstba:BusinessBankingMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMemberstba:BusinessBankingMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BusinessBankingMember2020-12-310000719220us-gaap:PassMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-12-310000719220us-gaap:SpecialMentionMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-12-310000719220us-gaap:SubstandardMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-12-310000719220us-gaap:DoubtfulMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-12-310000719220us-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-12-310000719220us-gaap:PassMemberstba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000719220us-gaap:SpecialMentionMemberstba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000719220stba:OtherConsumerMemberus-gaap:SubstandardMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000719220stba:OtherConsumerMemberus-gaap:DoubtfulMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000719220stba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000719220us-gaap:PassMember2020-12-310000719220us-gaap:SpecialMentionMember2020-12-310000719220us-gaap:SubstandardMember2020-12-310000719220us-gaap:DoubtfulMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberus-gaap:CommercialRealEstateMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:NonperformingFinancingReceivableMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberstba:CommercialAndIndustrialMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMemberus-gaap:NonperformingFinancingReceivableMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberus-gaap:ConstructionLoansMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:NonperformingFinancingReceivableMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberstba:BusinessBankingMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberstba:BusinessBankingMember2021-03-310000719220us-gaap:PerformingFinancingReceivableMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-03-310000719220us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberstba:ConsumerRealEstateMember2021-03-310000719220us-gaap:PerformingFinancingReceivableMemberstba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310000719220stba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMember2021-03-310000719220us-gaap:PerformingFinancingReceivableMember2021-03-310000719220us-gaap:NonperformingFinancingReceivableMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberus-gaap:CommercialRealEstateMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:NonperformingFinancingReceivableMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberstba:CommercialAndIndustrialMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMemberus-gaap:NonperformingFinancingReceivableMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberus-gaap:ConstructionLoansMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:NonperformingFinancingReceivableMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:PerformingFinancingReceivableMemberstba:BusinessBankingMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberstba:BusinessBankingMember2020-12-310000719220us-gaap:PerformingFinancingReceivableMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-12-310000719220us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberstba:ConsumerRealEstateMember2020-12-310000719220us-gaap:PerformingFinancingReceivableMemberstba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000719220stba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMember2020-12-310000719220us-gaap:PerformingFinancingReceivableMember2020-12-310000719220us-gaap:NonperformingFinancingReceivableMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialRealEstateMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberstba:CommercialAndIndustrialMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:ConstructionLoansMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberstba:BusinessBankingMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberstba:BusinessBankingMember2021-03-310000719220us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberstba:ConsumerRealEstateMember2021-03-310000719220us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-03-310000719220stba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-03-310000719220us-gaap:FinancingReceivables60To89DaysPastDueMemberstba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310000719220us-gaap:FinancingReceivables30To59DaysPastDueMember2021-03-310000719220us-gaap:FinancingReceivables60To89DaysPastDueMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:CommercialRealEstateMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberstba:CommercialAndIndustrialMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:ConstructionLoansMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:ConstructionLoansMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberstba:BusinessBankingMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMemberstba:BusinessBankingMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberstba:BusinessBankingMember2020-12-310000719220us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMemberstba:ConsumerRealEstateMember2020-12-310000719220us-gaap:FinancingReceivables60To89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-12-310000719220us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-12-310000719220stba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2020-12-310000719220us-gaap:FinancingReceivables60To89DaysPastDueMemberstba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000719220stba:OtherConsumerMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000719220us-gaap:FinancingReceivables30To59DaysPastDueMember2020-12-310000719220us-gaap:FinancingReceivables60To89DaysPastDueMember2020-12-310000719220us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:ConstructionLoansMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberstba:BusinessBankingMember2021-03-310000719220us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-03-310000719220stba:OtherConsumerMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2021-03-310000719220us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2019-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2020-01-012020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMember2019-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMember2020-01-012020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMember2019-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMember2020-01-012020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BusinessBankingMember2019-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BusinessBankingMember2020-01-012020-12-310000719220us-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2019-12-310000719220us-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-01-012020-12-310000719220stba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2019-12-310000719220stba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2020-01-012020-12-3100007192202020-01-012020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:RealEstateMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BusinessAssetsMemberus-gaap:CommercialRealEstateMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberstba:InvestmentAndCashCollateralMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:OtherCollateralMemberus-gaap:CommercialRealEstateMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMemberus-gaap:RealEstateMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BusinessAssetsMemberstba:CommercialAndIndustrialMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:InvestmentAndCashCollateralMemberstba:CommercialAndIndustrialMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:OtherCollateralMemberstba:CommercialAndIndustrialMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:RealEstateMemberus-gaap:ConstructionLoansMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BusinessAssetsMemberus-gaap:ConstructionLoansMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:InvestmentAndCashCollateralMemberus-gaap:ConstructionLoansMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:OtherCollateralMemberus-gaap:ConstructionLoansMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:RealEstateMemberstba:BusinessBankingMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BusinessAssetsMemberstba:BusinessBankingMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:InvestmentAndCashCollateralMemberstba:BusinessBankingMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:OtherCollateralMemberstba:BusinessBankingMember2021-03-310000719220us-gaap:RealEstateMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-03-310000719220stba:BusinessAssetsMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-03-310000719220stba:InvestmentAndCashCollateralMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-03-310000719220stba:OtherCollateralMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2021-03-310000719220us-gaap:RealEstateMember2021-03-310000719220stba:BusinessAssetsMember2021-03-310000719220stba:InvestmentAndCashCollateralMember2021-03-310000719220stba:OtherCollateralMember2021-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberus-gaap:RealEstateMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BusinessAssetsMemberus-gaap:CommercialRealEstateMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMemberstba:InvestmentAndCashCollateralMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:OtherCollateralMemberus-gaap:CommercialRealEstateMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMemberus-gaap:RealEstateMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BusinessAssetsMemberstba:CommercialAndIndustrialMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:InvestmentAndCashCollateralMemberstba:CommercialAndIndustrialMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:OtherCollateralMemberstba:CommercialAndIndustrialMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:RealEstateMemberus-gaap:ConstructionLoansMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BusinessAssetsMemberus-gaap:ConstructionLoansMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:InvestmentAndCashCollateralMemberus-gaap:ConstructionLoansMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:OtherCollateralMemberus-gaap:ConstructionLoansMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:RealEstateMemberstba:BusinessBankingMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BusinessAssetsMemberstba:BusinessBankingMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:InvestmentAndCashCollateralMemberstba:BusinessBankingMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:OtherCollateralMemberstba:BusinessBankingMember2020-12-310000719220us-gaap:RealEstateMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-12-310000719220stba:BusinessAssetsMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-12-310000719220stba:InvestmentAndCashCollateralMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-12-310000719220stba:OtherCollateralMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-12-310000719220us-gaap:RealEstateMember2020-12-310000719220stba:BusinessAssetsMember2020-12-310000719220stba:InvestmentAndCashCollateralMember2020-12-310000719220stba:OtherCollateralMember2020-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2019-12-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2019-12-310000719220us-gaap:CommercialPortfolioSegmentMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:ConstructionLoansMember2019-12-310000719220us-gaap:CommercialPortfolioSegmentMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberstba:BusinessBankingMember2019-12-310000719220srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2019-12-310000719220stba:OtherConsumerMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:ConsumerPortfolioSegmentMember2019-12-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMember2020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMember2020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:ConstructionLoansMember2020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberstba:BusinessBankingMember2020-03-310000719220us-gaap:ConsumerPortfolioSegmentMemberstba:ConsumerRealEstateMember2020-03-310000719220stba:OtherConsumerMemberus-gaap:ConsumerPortfolioSegmentMember2020-03-310000719220srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-01-010000719220stba:STLegacyLoanMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-01-010000719220srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberstba:DNBFinancialCorporationMember2020-01-010000719220us-gaap:CommercialPortfolioSegmentMemberstba:CommercialAndIndustrialMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-01-010000719220stba:COVID19Member2021-01-012021-03-310000719220stba:COVID19Member2020-01-012020-03-310000719220stba:COVID19Memberus-gaap:NonperformingFinancingReceivableMember2021-01-012021-03-310000719220stba:COVID19Memberus-gaap:NonperformingFinancingReceivableMember2021-03-310000719220stba:COVID19Memberus-gaap:NonperformingFinancingReceivableMember2020-03-310000719220us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialRealEstateMembersrt:HotelMemberstba:COVID19Member2021-03-310000719220us-gaap:OtherAssetsMemberus-gaap:InterestRateSwapMemberus-gaap:NondesignatedMember2021-03-310000719220us-gaap:OtherAssetsMemberus-gaap:InterestRateSwapMemberus-gaap:NondesignatedMember2020-12-310000719220us-gaap:OtherLiabilitiesMemberus-gaap:InterestRateSwapMemberus-gaap:NondesignatedMember2021-03-310000719220us-gaap:OtherLiabilitiesMemberus-gaap:InterestRateSwapMemberus-gaap:NondesignatedMember2020-12-310000719220us-gaap:OtherAssetsMemberus-gaap:InterestRateLockCommitmentsMemberus-gaap:NondesignatedMember2021-03-310000719220us-gaap:OtherAssetsMemberus-gaap:InterestRateLockCommitmentsMemberus-gaap:NondesignatedMember2020-12-310000719220us-gaap:OtherLiabilitiesMemberus-gaap:InterestRateLockCommitmentsMemberus-gaap:NondesignatedMember2021-03-310000719220us-gaap:OtherLiabilitiesMemberus-gaap:InterestRateLockCommitmentsMemberus-gaap:NondesignatedMember2020-12-310000719220us-gaap:OtherAssetsMemberus-gaap:ForwardContractsMemberus-gaap:NondesignatedMember2021-03-310000719220us-gaap:OtherAssetsMemberus-gaap:ForwardContractsMemberus-gaap:NondesignatedMember2020-12-310000719220us-gaap:OtherLiabilitiesMemberus-gaap:ForwardContractsMemberus-gaap:NondesignatedMember2021-03-310000719220us-gaap:OtherLiabilitiesMemberus-gaap:ForwardContractsMemberus-gaap:NondesignatedMember2020-12-310000719220us-gaap:OtherAssetsMemberus-gaap:NondesignatedMember2021-03-310000719220us-gaap:OtherAssetsMemberus-gaap:NondesignatedMember2020-12-310000719220us-gaap:OtherLiabilitiesMemberus-gaap:NondesignatedMember2021-03-310000719220us-gaap:OtherLiabilitiesMemberus-gaap:NondesignatedMember2020-12-310000719220us-gaap:InterestRateSwapMemberus-gaap:NondesignatedMember2021-01-012021-03-310000719220us-gaap:InterestRateSwapMemberus-gaap:NondesignatedMember2020-01-012020-03-310000719220us-gaap:InterestRateLockCommitmentsMemberus-gaap:NondesignatedMember2021-01-012021-03-310000719220us-gaap:InterestRateLockCommitmentsMemberus-gaap:NondesignatedMember2020-01-012020-03-310000719220us-gaap:ForwardContractsMemberus-gaap:NondesignatedMember2021-01-012021-03-310000719220us-gaap:ForwardContractsMemberus-gaap:NondesignatedMember2020-01-012020-03-310000719220us-gaap:NondesignatedMember2021-01-012021-03-310000719220us-gaap:NondesignatedMember2020-01-012020-03-310000719220us-gaap:CommitmentsToExtendCreditMember2021-01-012021-03-310000719220us-gaap:CommitmentsToExtendCreditMember2020-01-012020-12-310000719220us-gaap:StandbyLettersOfCreditMember2021-01-012021-03-310000719220us-gaap:StandbyLettersOfCreditMember2020-01-012020-12-310000719220srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-12-310000719220srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2020-12-310000719220srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2019-12-310000719220us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-01-012021-03-310000719220us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-01-012020-03-310000719220us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember2021-01-012021-03-310000719220us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember2020-01-012020-03-310000719220us-gaap:FixedIncomeFundsMember2021-03-310000719220us-gaap:DefinedBenefitPlanEquitySecuritiesMember2021-03-310000719220stba:NewShareRepurchasePlanMember2021-03-150000719220stba:NewShareRepurchasePlanMember2021-03-310000719220stba:NewShareRepurchasePlanMember2021-01-012021-03-310000719220stba:NewShareRepurchasePlanMember2020-01-012020-12-31

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
 ______________________________________
FORM 10-Q
______________________________________ 
(Mark One)
QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended March 31, 2021
OR
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from            to                
Commission file number 0-12508
______________________________________ 
S&T BANCORP INC.
(Exact name of registrant as specified in its charter)
______________________________________ 
Pennsylvania
 25-1434426
(State or other jurisdiction of incorporation or organization) (IRS Employer Identification No.)
800 Philadelphia StreetIndianaPA 15701
(Address of principal executive offices) (zip code)
800-325-2265
(Registrant’s telephone number, including area code)
Not Applicable
(Former name, former address, and former fiscal year, if changed since last report)
Securities registered pursuant to Section 12(b) of the Act:
Title of each classTrading Symbol(s)Name of each exchange on which registered
Common Stock, $2.50 par valueSTBAThe NASDAQ Stock Market LLC
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes      No  
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes      No  
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act. 
Large accelerated filer
Accelerated filer
Non-accelerated filer
 
Smaller reporting company
Emerging growth company
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes  No 
APPLICABLE ONLY TO CORPORATE ISSUERS:
Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practical date.
Common Stock, $2.50 Par Value - 39,360,750 shares as of April 30, 2021



Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES



INDEX
S&T BANCORP, INC. AND SUBSIDIARIES
 
  Page No.    
1

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS
(Unaudited)


March 31, 2021December 31, 2020
( in thousands, except share and per share data)(Unaudited)(Audited)
ASSETS
Cash and due from banks, including interest-bearing deposits of $601,134 and $158,903 at March 31, 2021 and December 31, 2020
$671,429 $229,666 
Securities, at fair value817,299 773,693 
Loans held for sale12,794 18,528 
Portfolio loans, net of unearned income7,183,168 7,225,860 
Allowance for credit losses on loans(115,101)(117,612)
Portfolio loans, net7,068,067 7,108,248 
Bank owned life insurance82,677 82,303 
Premises and equipment, net54,720 55,614 
Federal Home Loan Bank and other restricted stock, at cost12,199 13,030 
Goodwill373,424 373,424 
Other intangible assets, net8,211 8,675 
Other assets228,159 304,716 
Total Assets$9,328,979 $8,967,897 
LIABILITIES
Deposits:
Noninterest-bearing demand$2,539,594 $2,261,994 
Interest-bearing demand976,225 864,510 
Money market2,002,857 1,937,063 
Savings1,036,927 969,508 
Certificates of deposit1,320,425 1,387,463 
Total Deposits7,876,028 7,420,538 
Securities sold under repurchase agreements67,417 65,163 
Short-term borrowings 75,000 
Long-term borrowings23,282 23,681 
Junior subordinated debt securities64,097 64,083 
Other liabilities129,877 164,721 
Total Liabilities8,160,701 7,813,186 
SHAREHOLDERS’ EQUITY
Common stock ($2.50 par value)
Authorized—50,000,000 shares
Issued—41,449,444 shares at March 31, 2021 and December 31, 2020
Outstanding—39,268,359 shares at March 31, 2021 and 39,298,007 shares at December 31, 2020
103,623 103,623 
Additional paid-in capital401,353 400,668 
Retained earnings731,718 710,061 
Accumulated other comprehensive income1,061 8,971 
Treasury stock — 2,181,085 shares at March 31, 2021 and 2,151,437 shares at December 31, 2020, at cost
(69,477)(68,612)
Total Shareholders’ Equity1,168,278 1,154,711 
Total Liabilities and Shareholders’ Equity$9,328,979 $8,967,897 

See Notes to Consolidated Financial Statements
2

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
(Unaudited)
 Three months ended March 31,
(dollars in thousands, except per share data)20212020
INTEREST AND DIVIDEND INCOME
Loans, including fees$70,232 $82,051 
Investment Securities:
Taxable3,563 4,215 
Tax-exempt813 870 
Dividends173 453 
Total Interest and Dividend Income74,781 87,589 
INTEREST EXPENSE
Deposits3,481 15,338 
Borrowings and junior subordinated debt securities641 2,215 
Total Interest Expense4,122 17,553 
NET INTEREST INCOME70,659 70,036 
Provision for credit losses3,137 20,050 
Net Interest Income After Provision for Credit Losses67,522 49,986 
NONINTEREST INCOME
Net gain on sale of securities  
Mortgage banking4,310 1,236 
Debit and credit card4,162 3,482 
Service charges on deposit accounts3,474 4,008 
Wealth management2,944 2,362 
Commercial loan swap income95 2,484 
Other2,252 (1,169)
Total Noninterest Income17,236 12,403 
NONINTEREST EXPENSE
Salaries and employee benefits23,327 21,335 
Data processing and information technology4,225 3,868 
Occupancy3,827 3,765 
Furniture, equipment and software2,640 2,519 
Professional services and legal1,531 1,048 
Other Taxes1,436 1,600 
Marketing1,322 1,111 
FDIC Insurance1,046 770 
Merger related expenses 2,342 
Other6,226 8,033 
Total Noninterest Expense45,580 46,391 
Income Before Taxes39,178 15,998 
Income tax expense 7,276 2,767 
Net Income $31,902 $13,231 
Earnings per share—basic$0.81 $0.34 
Earnings per share—diluted$0.81 $0.34 
Dividends declared per share$0.28 $0.28 
Comprehensive Income$23,992 $30,573 
See Notes to Consolidated Financial Statements

3

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY
(Unaudited)


For the three months ended March 31, 2020
(dollars in thousands, except share and per share data)Common
Stock
Additional
Paid-in
Capital
Retained
Earnings
Accumulated
Other
Comprehensive (Loss) Income
Treasury
Stock
Total
Balance at January 1, 2020$103,623 $399,944 $761,083 $(11,670)$(60,982)$1,191,998 
Net income for the three months ended March 31, 2020— — 13,231 — — 13,231 
Other comprehensive income, net of tax— — — 17,342 — 17,342 
Adoption of accounting standard - credit losses— — (22,590)— — (22,590)
Cash dividends declared ($0.28 per share)
— — (11,051)— — (11,051)
Forfeitures of restricted stock, net of issuances (26,739 shares, net of issuance of 3,290 shares)
— — 53 — (616)(563)
Repurchase of common stock (411,430 shares)
— — — — (12,559)(12,559)
Recognition of restricted stock compensation expense— 443 — — — 443 
Balance at March 31, 2020$103,623 $400,387 $740,726 $5,672 $(74,157)$1,176,251 
See Notes to Consolidated Financial Statements
For the three months ended March 31, 2021
(dollars in thousands, except share and per share data)Common
Stock
Additional
Paid-in
Capital
Retained
Earnings
Accumulated
Other
Comprehensive Income
Treasury
Stock
Total
Balance at January 1, 2021$103,623 $400,668 $710,061 $8,971 $(68,612)$1,154,711 
Net income for the three months ended March 31, 2021— — 31,902 — — 31,902 
Other comprehensive loss, net of tax— — — (7,910)— (7,910)
Cash dividends declared ($0.28 per share)
— — (10,975)— — (10,975)
Forfeitures of restricted stock, net of issuances (30,840 shares, net of issuance of 1,192 shares)
— — 730 — (865)(135)
Recognition of restricted stock compensation expense— 685 — — — 685 
Balance at March 31, 2021$103,623 $401,353 $731,718 $1,061 $(69,477)$1,168,278 
See Notes to Consolidated Financial Statements
4

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS
(Unaudited)
Three Months Ended March 31,
(dollars in thousands)20212020
Net Cash Provided by (Used in) Operating Activities$90,145 $(59,961)
INVESTING ACTIVITIES
Purchases of securities(89,038)(30,292)
Proceeds from maturities, prepayments and calls of securities34,715 33,869 
Net proceeds from sales (purchases of) of Federal Home Loan Bank stock831 (5,277)
Net decrease (increase) in loans33,937 (122,507)
Proceeds from sale of loans not originated for resale640  
Purchases of premises and equipment(811)(1,429)
Proceeds from the sale of premises and equipment74  
Net Cash Used in Investing Activities(19,652)(125,636)
FINANCING ACTIVITIES
Net increase in core deposits522,528 28,684 
Net decrease in certificates of deposit(67,003)(7,042)
Net increase in securities sold under repurchase agreements2,254 49,756 
Net decrease (increase) in short-term borrowings(75,000)128,921 
Repayments on long-term borrowings(399)(688)
Treasury shares issued-net(135)(563)
Cash dividends paid to common shareholders(10,975)(11,051)
Repurchase of common stock (12,559)
Net Cash Provided by Financing Activities371,270 175,458 
Net increase (decrease) in cash and cash equivalents441,763 (10,139)
Cash and cash equivalents at beginning of period229,666 197,823 
Cash and Cash Equivalents at End of Period$671,429 $187,684 
Supplemental Disclosures