Loans - Risk Category of Loans by Class (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 3,772,866		$ 3,788,645
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total	1,238	$ 369
Commercial and Industrial Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	23,934		158,088
2022-2021	152,250		123,425
2021-2020	109,484		41,375
2020-2019	38,149		47,887
2019-2018	44,561		20,002
Prior	68,956		56,065
Revolving Loans Amortized Cost Basis	171,536		173,264
Total	608,870		620,106
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
2023	0
2022	520
2021	32
2020	30
2019	0
Prior	50
Revolving Loans Amortized Cost Basis	101
Total	733	5
Commercial Real Estate Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	64,742		402,613
2022-2021	418,921		496,943
2021-2020	495,371		266,563
2020-2019	255,212		164,251
2019-2018	160,499		143,819
Prior	571,760		457,532
Revolving Loans Amortized Cost Basis	33,732		35,163
Total	2,000,237		1,966,884
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	78
Agricultural Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	12,228		63,307
2022-2021	61,372		48,734
2021-2020	47,000		54,049
2020-2019	52,128		30,009
2019-2018	27,619		24,168
Prior	127,307		108,974
Revolving Loans Amortized Cost Basis	50,933		88,172
Total	378,587		417,413
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
Leases
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	8,085		20,057
2022-2021	8,904		14,461
2021-2020	13,392		9,648
2020-2019	18,227		8,901
2019-2018	7,050		1,851
Prior	2,778		1,478
Revolving Loans Amortized Cost Basis	0		0
Total	58,436		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
Pass | Commercial and Industrial Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	23,934		156,318
2022-2021	151,024		117,648
2021-2020	103,507		39,949
2020-2019	36,957		46,505
2019-2018	42,665		18,423
Prior	64,882		51,482
Revolving Loans Amortized Cost Basis	155,521		154,203
Total	578,490		584,528
Pass | Commercial Real Estate Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	64,742		398,631
2022-2021	414,758		490,747
2021-2020	488,827		261,462
2020-2019	249,845		162,701
2019-2018	158,968		129,151
Prior	530,615		427,433
Revolving Loans Amortized Cost Basis	33,620		35,163
Total	1,941,375		1,905,288
Pass | Agricultural Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	10,620		62,673
2022-2021	61,039		47,682
2021-2020	45,959		47,355
2020-2019	45,512		25,431
2019-2018	24,363		21,728
Prior	109,918		92,344
Revolving Loans Amortized Cost Basis	47,769		83,862
Total	345,180		381,075
Pass | Leases
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	8,085		20,057
2022-2021	8,904		14,461
2021-2020	13,392		9,648
2020-2019	18,227		8,901
2019-2018	7,050		1,851
Prior	2,778		1,478
Revolving Loans Amortized Cost Basis	0		0
Total	58,436		56,396
Special Mention | Commercial and Industrial Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	0		56
2022-2021	55		148
2021-2020	574		577
2020-2019	713		78
2019-2018	673		551
Prior	1,649		2,346
Revolving Loans Amortized Cost Basis	1,990		1,672
Total	5,654		5,428
Special Mention | Commercial Real Estate Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	0		3,982
2022-2021	3,953		1,568
2021-2020	1,413		4,612
2020-2019	4,816		135
2019-2018	133		13,689
Prior	35,707		25,371
Revolving Loans Amortized Cost Basis	0		0
Total	46,022		49,357
Special Mention | Agricultural Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	1,608		634
2022-2021	333		842
2021-2020	833		6,066
2020-2019	5,991		4,149
2019-2018	2,837		2,355
Prior	12,289		11,440
Revolving Loans Amortized Cost Basis	3,139		4,310
Total	27,030		29,796
Special Mention | Leases
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	0		0
2022-2021	0		0
2021-2020	0		0
2020-2019	0		0
2019-2018	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Total	0		0
Substandard | Commercial and Industrial Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	0		1,714
2022-2021	1,171		5,629
2021-2020	5,403		849
2020-2019	479		1,304
2019-2018	1,223		1,028
Prior	2,425		2,237
Revolving Loans Amortized Cost Basis	14,025		17,389
Total	24,726		30,150
Substandard | Commercial Real Estate Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	0		0
2022-2021	210		4,628
2021-2020	5,131		489
2020-2019	551		1,415
2019-2018	1,398		979
Prior	5,438		4,728
Revolving Loans Amortized Cost Basis	112		0
Total	12,840		12,239
Substandard | Agricultural Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	0		0
2022-2021	0		210
2021-2020	208		628
2020-2019	625		429
2019-2018	419		85
Prior	5,100		5,190
Revolving Loans Amortized Cost Basis	25		0
Total	6,377		6,542
Substandard | Leases
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	0		0
2022-2021	0		0
2021-2020	0		0
2020-2019	0		0
2019-2018	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Total	0		0
Doubtful | Commercial and Industrial Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	0		0
2022-2021	0		0
2021-2020	0		0
2020-2019	0		0
2019-2018	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Total	0		0
Doubtful | Commercial Real Estate Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	0		0
2022-2021	0		0
2021-2020	0		0
2020-2019	0		0
2019-2018	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Total	0		0
Doubtful | Agricultural Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	0		0
2022-2021	0		0
2021-2020	0		0
2020-2019	0		0
2019-2018	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Total	0		0
Doubtful | Leases
Financing Receivable, Credit Quality Indicator [Line Items]
2023-2022	0		0
2022-2021	0		0
2021-2020	0		0
2020-2019	0		0
2019-2018	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Total	$ 0		$ 0