Loans - Past Due Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	$ 3,108,421	$ 2,660,532	$ 2,710,144
Accruing Loans Past Due 90 Days or More	553	201
Financing Receivable, before Allowance for Credit Loss and Fee	3,108,113	2,660,233
Agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	112,705	106,933	94,842
Accruing Loans Past Due 90 Days or More	0	6
Financing Receivable, before Allowance for Credit Loss and Fee	112,705	106,933
Commercial and financial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	269,568	222,002	286,242
Accruing Loans Past Due 90 Days or More	0	91
Financing Receivable, before Allowance for Credit Loss and Fee	269,568	222,002
Construction, 1 to 4 family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	92,408	80,486
Accruing Loans Past Due 90 Days or More	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	92,408	80,486
Construction, land development and commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	196,240	127,021
Accruing Loans Past Due 90 Days or More	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	196,240	127,021
Mortgage, farmland
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	256,570	232,744	$ 247,142
Accruing Loans Past Due 90 Days or More	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	256,570	232,744
Mortgage, 1 to 4 family first liens
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	1,130,989	909,564
Accruing Loans Past Due 90 Days or More	553	104
Financing Receivable, before Allowance for Credit Loss and Fee	1,130,989	909,564
Mortgage, 1 to 4 family junior liens
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	124,951	114,342
Accruing Loans Past Due 90 Days or More	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	124,951	114,342
Mortgage, multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	436,952	382,792
Accruing Loans Past Due 90 Days or More	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	436,952	382,792
Mortgage, commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	402,842	401,377
Accruing Loans Past Due 90 Days or More	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	402,842	401,377
Loans to Individuals
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	36,675	32,687
Accruing Loans Past Due 90 Days or More	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	36,675	32,687
Obligations of State and Political Subdivisions
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	48,213	50,285
Accruing Loans Past Due 90 Days or More	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	48,213	50,285
30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	5,214	8,322
30 - 59 Days Past Due | Agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	314	41
30 - 59 Days Past Due | Commercial and financial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	421	300
30 - 59 Days Past Due | Construction, 1 to 4 family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	0	276
30 - 59 Days Past Due | Construction, land development and commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	0	194
30 - 59 Days Past Due | Mortgage, farmland
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	24	503
30 - 59 Days Past Due | Mortgage, 1 to 4 family first liens
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	3,421	5,085
30 - 59 Days Past Due | Mortgage, 1 to 4 family junior liens
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	473	246
30 - 59 Days Past Due | Mortgage, multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	0	640
30 - 59 Days Past Due | Mortgage, commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	247	466
30 - 59 Days Past Due | Loans to Individuals
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	314	177
30 - 59 Days Past Due | Obligations of State and Political Subdivisions
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	0	394
60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	1,594	1,896
60 - 89 Days Past Due | Agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	0	0
60 - 89 Days Past Due | Commercial and financial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	132	537
60 - 89 Days Past Due | Construction, 1 to 4 family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	0	0
60 - 89 Days Past Due | Construction, land development and commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	1,183	66
60 - 89 Days Past Due | Mortgage, farmland
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	162	362
60 - 89 Days Past Due | Mortgage, 1 to 4 family first liens
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	45	864
60 - 89 Days Past Due | Mortgage, 1 to 4 family junior liens
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	19	41
60 - 89 Days Past Due | Mortgage, multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	0	0
60 - 89 Days Past Due | Mortgage, commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	0	0
60 - 89 Days Past Due | Loans to Individuals
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	53	26
60 - 89 Days Past Due | Obligations of State and Political Subdivisions
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	0	0
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	3,474	4,222
90 Days or More Past Due | Agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	0	219
90 Days or More Past Due | Commercial and financial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	6	468
90 Days or More Past Due | Construction, 1 to 4 family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	105	0
90 Days or More Past Due | Construction, land development and commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	191	96
90 Days or More Past Due | Mortgage, farmland
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	60	0
90 Days or More Past Due | Mortgage, 1 to 4 family first liens
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	3,029	2,481
90 Days or More Past Due | Mortgage, 1 to 4 family junior liens
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	8	124
90 Days or More Past Due | Mortgage, multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	0	0
90 Days or More Past Due | Mortgage, commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	75	829
90 Days or More Past Due | Loans to Individuals
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	0	5
90 Days or More Past Due | Obligations of State and Political Subdivisions
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	0	0
Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	10,282	14,440
Total Past Due | Agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	314	260
Total Past Due | Commercial and financial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	559	1,305
Total Past Due | Construction, 1 to 4 family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	105	276
Total Past Due | Construction, land development and commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	1,374	356
Total Past Due | Mortgage, farmland
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	246	865
Total Past Due | Mortgage, 1 to 4 family first liens
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	6,495	8,430
Total Past Due | Mortgage, 1 to 4 family junior liens
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	500	411
Total Past Due | Mortgage, multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	0	640
Total Past Due | Mortgage, commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	322	1,295
Total Past Due | Loans to Individuals
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	367	208
Total Past Due | Obligations of State and Political Subdivisions
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	0	394
Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	3,097,831	2,645,793
Current | Agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	112,391	106,673
Current | Commercial and financial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	269,009	220,697
Current | Construction, 1 to 4 family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	92,303	80,210
Current | Construction, land development and commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	194,866	126,665
Current | Mortgage, farmland
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	256,324	231,879
Current | Mortgage, 1 to 4 family first liens
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	1,124,494	901,134
Current | Mortgage, 1 to 4 family junior liens
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	124,451	113,931
Current | Mortgage, multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	436,952	382,152
Current | Mortgage, commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	402,520	400,082
Current | Loans to Individuals
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	36,308	32,479
Current | Obligations of State and Political Subdivisions
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	$ 48,213	$ 49,891