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Loans and Allowance for Credit Losses - Allowance for Credit Losses Based on Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance	$ 58,223	$ 58,474	$ 59,093	$ 54,655	$ 54,655
Provision for credit loss expense	458	907	(359)	3,859	4,806
Loans charged off	580	571	1,060	1,345	2,950
Recoveries collected	618	265	1,045	1,043	1,719
Allowance for credit losses, Ending Balance	58,719	59,075	58,719	59,075	59,093
Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance				863	863
Construction and Land Development | Real Estate Loan
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance	2,426	1,988	2,250	1,743	1,743
Provision for credit loss expense	(204)	54	(28)	29	137
Loans charged off	14	0	14	2	2
Recoveries collected	0	0	0	0	100
Allowance for credit losses, Ending Balance	2,208	2,042	2,208	2,042	2,250
Construction and Land Development | Real Estate Loan | Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance				272	272
Agricultural | Real Estate Loan
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance	1,404	1,971	1,433	1,257	1,257
Provision for credit loss expense	(34)	141	(63)	855	176
Loans charged off	0	0	0	0	0
Recoveries collected	0	0	0	0	0
Allowance for credit losses, Ending Balance	1,370	2,112	1,370	2,112	1,433
Agricultural | Real Estate Loan | Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance				0	0
Residential Properties | Real Estate Loan | 1-4 Family
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance	3,420	3,728	3,742	2,330	2,330
Provision for credit loss expense	(235)	(178)	(541)	1,086	1,241
Loans charged off	16	69	56	141	191
Recoveries collected	78	42	102	245	359
Allowance for credit losses, Ending Balance	3,247	3,523	3,247	3,523	3,742
Residential Properties | Real Estate Loan | 1-4 Family | Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance				3	3
Commercial | Real Estate Loan
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance	27,327	30,345	28,157	26,246	26,246
Provision for credit loss expense	385	(1,433)	(449)	2,180	1,462
Loans charged off	25	68	25	407	414
Recoveries collected	327	12	331	359	385
Allowance for credit losses, Ending Balance	28,014	28,856	28,014	28,856	28,157
Commercial | Real Estate Loan | Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance				478	478
Agricultural Loans
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance	580	1,051	585	983	983
Provision for credit loss expense	213	(72)	205	(4)	(359)
Loans charged off	276	93	276	93	93
Recoveries collected	7	0	10	0	54
Allowance for credit losses, Ending Balance	524	886	524	886	585
Agricultural Loans | Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance				0	0
Commercial and Industrial Loans
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance	21,142	17,348	20,808	19,241	19,241
Provision for credit loss expense	414	2,117	505	72	2,135
Loans charged off	49	32	62	35	870
Recoveries collected	37	63	293	124	208
Allowance for credit losses, Ending Balance	21,544	19,496	21,544	19,496	20,808
Commercial and Industrial Loans | Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance				94	94
Consumer Loans
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance	1,924	2,043	2,118	2,855	2,855
Provision for credit loss expense	(81)	278	12	(359)	14
Loans charged off	200	309	627	667	1,380
Recoveries collected	169	148	309	315	613
Allowance for credit losses, Ending Balance	$ 1,812	$ 2,160	$ 1,812	2,160	2,118
Consumer Loans | Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13
Allowance for loan losses [Abstract]
Allowance for credit losses, Beginning Balance				$ 16	$ 16

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