Allowance for Credit Losses - Amortized cost basis of collateral dependent loans (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	$ 12,289	$ 13,920
Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	155	156
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	1,978,843	1,978,358
Commercial | Commercial & Industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	662,785	675,323
Commercial | Commercial & Industrial | Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	3,983	4,613
Commercial | Commercial & Industrial | Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable		1
Commercial | Farmland
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	130,804	125,375
Commercial | Farmland | Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	2,224	3,289
Commercial | Non Farm, Non Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	395,364	386,542
Commercial | Non Farm, Non Residential | Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	4,818	5,123
Commercial | Agriculture
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	106,248	135,500
Commercial | Agriculture | Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	155	155
Commercial | All Other Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	503,039	475,520
Commercial | Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	180,603	180,098
Residential | First Liens
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	352,425	346,972
Residential | Home Equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	61,727	64,119
Residential | Junior Liens
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	56,571	56,836
Residential | Multifamily | Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	1,264	895
Residential | All Other Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	24,652	25,439
Consumer | Motor Vehicle
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	566,562	555,302
Consumer | All Other Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	$ 31,737	$ 33,237