Allowance for Credit Losses - Amortized cost basis of collateral dependent loans (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	$ 10,255	$ 13,920
Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	1,054	156
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	1,960,829	1,978,358
Commercial | Commercial & Industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	641,111	675,323
Commercial | Commercial & Industrial | Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	3,500	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	131,169	125,375
Commercial | Farmland | Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	2,094	3,289
Commercial | Non Farm, Non Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	418,132	386,542
Commercial | Non Farm, Non Residential | Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	4,239	5,123
Commercial | Agriculture
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	117,085	135,500
Commercial | Agriculture | Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	49
Commercial | Agriculture | Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	1,054	155
Commercial | All Other Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	467,507	475,520
Commercial | Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	185,825	180,098
Residential | First Liens
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	357,234	346,972
Residential | Home Equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	63,358	64,119
Residential | Junior Liens
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	57,633	56,836
Residential | Multifamily | Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	373	895
Residential | All Other Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	23,019	25,439
Consumer | Motor Vehicle
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	614,798	555,302
Consumer | All Other Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	$ 32,860	$ 33,237