Loans (Risk Category of Loans) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	$ 3,977,900	$ 3,788,645
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total	3,791	2,850	$ 3,835
Commercial and Industrial Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	112,673	158,088
One year before current fiscal year	135,337	123,425
Two year before current fiscal year	86,555	41,375
Three year before current fiscal year	30,101	47,887
Four year before current fiscal year	34,281	20,002
Prior	49,183	56,065
Revolving Loans Amortized Cost Basis	141,411	173,264
Loans	589,541	620,106
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
2023	0
2022	911
2021	32
2020	493
2019	7
Prior	88
Revolving Loans Amortized Cost Basis	261
Total	1,792	1,149	2,777
Commercial Real Estate Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	314,475	402,613
One year before current fiscal year	419,892	496,943
Two year before current fiscal year	487,582	266,563
Three year before current fiscal year	228,461	164,251
Four year before current fiscal year	148,419	143,819
Prior	481,090	457,532
Revolving Loans Amortized Cost Basis	41,916	35,163
Loans	2,121,835	1,966,884
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
2023	0
2022	0
2021	56
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Total	56	79	10
Agricultural Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	46,443	63,307
One year before current fiscal year	56,455	48,734
Two year before current fiscal year	40,954	54,049
Three year before current fiscal year	47,514	30,009
Four year before current fiscal year	25,755	24,168
Prior	114,968	108,974
Revolving Loans Amortized Cost Basis	91,714	88,172
Loans	423,803	417,413
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
2023	0
2022	0
2021	0
2020	2
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	25
Total	27	0	0
Leases
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	36,848	20,057
One year before current fiscal year	12,281	14,461
Two year before current fiscal year	10,634	9,648
Three year before current fiscal year	6,086	8,901
Four year before current fiscal year	4,788	1,851
Prior	1,351	1,478
Revolving Loans Amortized Cost Basis	0	0
Loans	71,988	56,396
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Total	0	0	$ 0
Pass | Commercial and Industrial Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	112,626	156,318
One year before current fiscal year	134,590	117,648
Two year before current fiscal year	80,738	39,949
Three year before current fiscal year	28,492	46,505
Four year before current fiscal year	32,585	18,423
Prior	45,764	51,482
Revolving Loans Amortized Cost Basis	134,936	154,203
Loans	569,731	584,528
Pass | Commercial Real Estate Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	300,569	398,631
One year before current fiscal year	416,874	490,747
Two year before current fiscal year	470,917	261,462
Three year before current fiscal year	225,668	162,701
Four year before current fiscal year	147,431	129,151
Prior	458,821	427,433
Revolving Loans Amortized Cost Basis	41,102	35,163
Loans	2,061,382	1,905,288
Pass | Agricultural Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	44,948	62,673
One year before current fiscal year	56,291	47,682
Two year before current fiscal year	39,852	47,355
Three year before current fiscal year	42,279	25,431
Four year before current fiscal year	23,217	21,728
Prior	100,391	92,344
Revolving Loans Amortized Cost Basis	89,455	83,862
Loans	396,433	381,075
Pass | Leases
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	36,848	20,057
One year before current fiscal year	12,281	14,461
Two year before current fiscal year	10,634	9,648
Three year before current fiscal year	6,086	8,901
Four year before current fiscal year	4,788	1,851
Prior	1,351	1,478
Revolving Loans Amortized Cost Basis	0	0
Loans	71,988	56,396
Special Mention | Commercial and Industrial Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	47	56
One year before current fiscal year	453	148
Two year before current fiscal year	128	577
Three year before current fiscal year	829	78
Four year before current fiscal year	0	551
Prior	1,948	2,346
Revolving Loans Amortized Cost Basis	3,048	1,672
Loans	6,453	5,428
Special Mention | Commercial Real Estate Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	13,906	3,982
One year before current fiscal year	2,401	1,568
Two year before current fiscal year	11,155	4,612
Three year before current fiscal year	1,651	135
Four year before current fiscal year	259	13,689
Prior	19,532	25,371
Revolving Loans Amortized Cost Basis	638	0
Loans	49,542	49,357
Special Mention | Agricultural Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	1,495	634
One year before current fiscal year	164	842
Two year before current fiscal year	903	6,066
Three year before current fiscal year	5,047	4,149
Four year before current fiscal year	2,338	2,355
Prior	9,894	11,440
Revolving Loans Amortized Cost Basis	2,259	4,310
Loans	22,100	29,796
Special Mention | Leases
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two year before current fiscal year	0	0
Three year before current fiscal year	0	0
Four year before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Loans	0	0
Substandard | Commercial and Industrial Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	1,714
One year before current fiscal year	294	5,629
Two year before current fiscal year	5,689	849
Three year before current fiscal year	780	1,304
Four year before current fiscal year	1,696	1,028
Prior	1,471	2,237
Revolving Loans Amortized Cost Basis	3,427	17,389
Loans	13,357	30,150
Substandard | Commercial Real Estate Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year before current fiscal year	617	4,628
Two year before current fiscal year	5,510	489
Three year before current fiscal year	1,142	1,415
Four year before current fiscal year	729	979
Prior	2,737	4,728
Revolving Loans Amortized Cost Basis	176	0
Loans	10,911	12,239
Substandard | Agricultural Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	210
Two year before current fiscal year	199	628
Three year before current fiscal year	188	429
Four year before current fiscal year	200	85
Prior	4,683	5,190
Revolving Loans Amortized Cost Basis	0	0
Loans	5,270	6,542
Substandard | Leases
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two year before current fiscal year	0	0
Three year before current fiscal year	0	0
Four year before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Loans	0	0
Doubtful | Commercial and Industrial Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two year before current fiscal year	0	0
Three year before current fiscal year	0	0
Four year before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Loans	0	0
Doubtful | Commercial Real Estate Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two year before current fiscal year	0	0
Three year before current fiscal year	0	0
Four year before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Loans	0	0
Doubtful | Agricultural Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two year before current fiscal year	0	0
Three year before current fiscal year	0	0
Four year before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Loans	0	0
Doubtful | Leases
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two year before current fiscal year	0	0
Three year before current fiscal year	0	0
Four year before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Loans	$ 0	$ 0