Fair Value - Assets and liabilities measured at fair value on a nonrecurring basis (Details) $ in Thousands	Mar. 31, 2023 USD ($) item	Dec. 31, 2022 USD ($) item
Fair Value
OREO	$ 3,473	$ 1,023
Individually evaluated loans	120,970	104,225
Nonrecurring basis | OREO | Fair Value
Fair Value
OREO	3,473	1,023
Nonrecurring basis | Bank properties held for sale | Fair Value
Fair Value
Bank properties held for sale	16,724	17,754
Nonrecurring basis | Non-acquired impaired loans | Fair Value
Fair Value
Individually evaluated loans	$ 28,650	$ 20,802
Nonrecurring basis | Significant Unobservable Inputs (Level 3) | Impaired loans
Quantitative Information about Level 3 Fair Value Measurements
Long-term Debt, Valuation Technique [Extensible List]	us-gaap:MarketApproachValuationTechniqueMember, us-gaap:ValuationTechniqueDiscountedCashFlowMember	us-gaap:MarketApproachValuationTechniqueMember, us-gaap:ValuationTechniqueDiscountedCashFlowMember
Long-term Debt, Measurement Input [Extensible List]	us-gaap:MeasurementInputDiscountRateMember	us-gaap:MeasurementInputDiscountRateMember
Nonrecurring basis | Significant Unobservable Inputs (Level 3) | Impaired loans | Weighted average
Quantitative Information about Level 3 Fair Value Measurements
Discount rate (as a percent) | item	0.24	0.31
Nonrecurring basis | Significant Unobservable Inputs (Level 3) | OREO
Fair Value
OREO	$ 3,473	$ 1,023
Quantitative Information about Level 3 Fair Value Measurements
Long-term Debt, Valuation Technique [Extensible List]	us-gaap:MarketApproachValuationTechniqueMember	us-gaap:MarketApproachValuationTechniqueMember
Long-term Debt, Measurement Input [Extensible List]	us-gaap:MeasurementInputCostToSellMember, us-gaap:MeasurementInputDiscountRateMember	us-gaap:MeasurementInputCostToSellMember, us-gaap:MeasurementInputDiscountRateMember
Nonrecurring basis | Significant Unobservable Inputs (Level 3) | OREO | Weighted average
Quantitative Information about Level 3 Fair Value Measurements
Discount rate (as a percent) | item	0.15	0.16
Nonrecurring basis | Significant Unobservable Inputs (Level 3) | Bank properties held for sale
Fair Value
Bank properties held for sale	$ 16,724	$ 17,754
Nonrecurring basis | Significant Unobservable Inputs (Level 3) | Non-acquired impaired loans
Fair Value
Individually evaluated loans	$ 28,650	$ 20,802