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Loans, Allowance for Credit Losses - Loans and Amortized Cost Basis of Loans Under CECL Methodology (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Collectively evaluated for impairment	$ 20,392		$ 19,181
Individually evaluated for impairment	2,405		1,972
Total Allowance for Credit Losses - Loans for impairment	22,797	$ 21,598	21,153	$ 21,652	$ 15,250	$ 18,552
Collectively evaluated for impairment	2,242,194		2,235,955
Individually evaluated for impairment	13,522		12,881
Total Loans	2,255,716		2,248,836
Residential [Member]
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Total Loans	305,963		310,199
Commercial [Member]
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Total Loans	1,110,269		1,092,887
Construction [Member]
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Total Loans	180,157		195,826
Real Estate Loans [Member] | Residential [Member]
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Collectively evaluated for impairment	2,304		2,285
Individually evaluated for impairment	51		69
Total Allowance for Credit Losses - Loans for impairment	2,355	2,347	2,354	2,675	1,195	1,056
Collectively evaluated for impairment	352,924		358,358
Individually evaluated for impairment	1,664		1,632
Total Loans	354,588		359,990
Real Estate Loans [Member] | Commercial [Member]
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Collectively evaluated for impairment	10,164		9,033
Individually evaluated for impairment	119		145
Total Allowance for Credit Losses - Loans for impairment	10,283	9,741	9,178	9,274	6,747	10,120
Collectively evaluated for impairment	1,107,745		1,090,217
Individually evaluated for impairment	2,524		2,670
Total Loans	1,110,269		1,092,887
Real Estate Loans [Member] | Agricultural [Member]
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Collectively evaluated for impairment	3,753		3,247
Individually evaluated for impairment	17		17
Total Allowance for Credit Losses - Loans for impairment	3,770	3,672	3,264	3,579	3,409	4,589
Collectively evaluated for impairment	324,538		311,500
Individually evaluated for impairment	2,519		3,302
Total Loans	327,057		314,802
Real Estate Loans [Member] | Construction [Member]
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Collectively evaluated for impairment	1,627		1,664
Individually evaluated for impairment	0		286
Total Allowance for Credit Losses - Loans for impairment	1,627	1,595	1,950	1,667	851	801
Collectively evaluated for impairment	178,209		193,469
Individually evaluated for impairment	1,948		2,357
Total Loans	180,157		195,826
Consumer [Member]
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Collectively evaluated for impairment	334		557
Individually evaluated for impairment	877		939
Total Allowance for Credit Losses - Loans for impairment	1,211	1,266	1,496	1,259	1,220	135
Collectively evaluated for impairment	69,585		60,377
Individually evaluated for impairment	957		939
Total Loans	70,542		61,316
Other Commercial Loans [Member]
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Collectively evaluated for impairment	1,915		1,713
Individually evaluated for impairment	1,341		516
Total Allowance for Credit Losses - Loans for impairment	3,256	2,680	2,229	2,477	712	1,040
Collectively evaluated for impairment	127,352		134,472
Individually evaluated for impairment	3,499		1,696
Total Loans	130,851		136,168
Other Agricultural Loans [Member]
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Collectively evaluated for impairment	206		270
Individually evaluated for impairment	0		0
Total Allowance for Credit Losses - Loans for impairment	206	174	270	268	250	489
Collectively evaluated for impairment	25,836		30,388
Individually evaluated for impairment	411		285
Total Loans	26,247		30,673
State and Political Subdivision Loans [Member]
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Collectively evaluated for impairment	63		45
Individually evaluated for impairment	0		0
Total Allowance for Credit Losses - Loans for impairment	63	65	45	52	42	322
Collectively evaluated for impairment	56,005		57,174
Individually evaluated for impairment	0		0
Total Loans	56,005		57,174
Unallocated [Member]
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Collectively evaluated for impairment	26		367
Individually evaluated for impairment	0		0
Total Allowance for Credit Losses - Loans for impairment	26	$ 58	367	$ 401	$ 824	$ 0
Collectively evaluated for impairment	0		0
Individually evaluated for impairment	0		0
Total Loans	$ 0		$ 0

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