Loans - Risk Category of Loans by Class (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 3,656,034	$ 3,007,926
Commercial and Industrial Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2022-2021	40,839	141,348
2021-2020	141,324	58,826
2020-2019	57,627	61,110
2019-2018	62,088	30,716
2018-2017	35,146	17,321
Prior	76,521	51,934
Revolving Loans Amortized Cost Basis	167,274	131,750
Total	580,819	493,005
Commercial Real Estate Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2022-2021	74,359	406,528
2021-2020	526,253	264,011
2020-2019	328,276	172,601
2019-2018	196,858	147,700
2018-2017	177,621	157,144
Prior	592,282	355,996
Revolving Loans Amortized Cost Basis	42,879	26,697
Total	1,938,528	1,530,677
Agricultural Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2022-2021	10,499	46,224
2021-2020	56,702	50,447
2020-2019	62,976	28,048
2019-2018	34,524	27,597
2018-2017	28,904	31,811
Prior	125,365	84,741
Revolving Loans Amortized Cost Basis	68,794	89,282
Total	387,764	358,150
Leases
Financing Receivable, Credit Quality Indicator [Line Items]
2022-2021	5,106	19,689
2021-2020	18,166	12,706
2020-2019	11,958	12,990
2019-2018	12,028	5,599
2018-2017	4,706	2,473
Prior	3,736	1,888
Revolving Loans Amortized Cost Basis	0	0
Total	55,700	55,345
Pass | Commercial and Industrial Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2022-2021	40,839	141,133
2021-2020	141,045	57,477
2020-2019	55,388	60,883
2019-2018	61,429	29,005
2018-2017	32,911	15,936
Prior	71,811	48,559
Revolving Loans Amortized Cost Basis	156,335	122,377
Total	559,758	475,370
Pass | Commercial Real Estate Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2022-2021	73,592	404,175
2021-2020	524,161	264,011
2020-2019	323,046	164,204
2019-2018	187,795	131,746
2018-2017	157,093	139,788
Prior	545,026	336,066
Revolving Loans Amortized Cost Basis	42,879	26,697
Total	1,853,592	1,466,687
Pass | Agricultural Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2022-2021	10,349	44,510
2021-2020	54,878	45,101
2020-2019	55,868	22,482
2019-2018	28,967	24,187
2018-2017	25,582	24,325
Prior	106,671	71,268
Revolving Loans Amortized Cost Basis	62,604	81,011
Total	344,919	312,884
Pass | Leases
Financing Receivable, Credit Quality Indicator [Line Items]
2022-2021	5,106	19,689
2021-2020	18,166	12,706
2020-2019	11,958	12,990
2019-2018	12,028	5,599
2018-2017	4,706	2,473
Prior	3,736	1,888
Revolving Loans Amortized Cost Basis	0	0
Total	55,700	55,345
Special Mention | Commercial and Industrial Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2022-2021	0	115
2021-2020	109	128
2020-2019	598	227
2019-2018	206	649
2018-2017	1,124	7
Prior	897	918
Revolving Loans Amortized Cost Basis	2,210	1,510
Total	5,144	3,554
Special Mention | Commercial Real Estate Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2022-2021	767	2,279
2021-2020	1,896	0
2020-2019	5,230	710
2019-2018	703	14,426
2018-2017	16,420	17,356
Prior	39,276	13,916
Revolving Loans Amortized Cost Basis	0	0
Total	64,292	48,687
Special Mention | Agricultural Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2022-2021	150	1,714
2021-2020	1,605	5,346
2020-2019	7,108	5,503
2019-2018	5,500	3,025
2018-2017	2,943	6,438
Prior	13,940	6,624
Revolving Loans Amortized Cost Basis	5,894	8,271
Total	37,140	36,921
Special Mention | Leases
Financing Receivable, Credit Quality Indicator [Line Items]
2022-2021	0	0
2021-2020	0	0
2020-2019	0	0
2019-2018	0	0
2018-2017	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]
2022-2021	0	100
2021-2020	170	1,221
2020-2019	1,641	0
2019-2018	453	1,062
2018-2017	1,111	1,378
Prior	3,813	2,457
Revolving Loans Amortized Cost Basis	8,729	7,863
Total	15,917	14,081
Substandard | Commercial Real Estate Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2022-2021	0	74
2021-2020	196	0
2020-2019	0	7,687
2019-2018	8,360	1,528
2018-2017	4,108	0
Prior	7,980	6,014
Revolving Loans Amortized Cost Basis	0	0
Total	20,644	15,303
Substandard | Agricultural Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2022-2021	0	0
2021-2020	219	0
2020-2019	0	63
2019-2018	57	385
2018-2017	379	1,048
Prior	4,754	6,849
Revolving Loans Amortized Cost Basis	296	0
Total	5,705	8,345
Substandard | Leases
Financing Receivable, Credit Quality Indicator [Line Items]
2022-2021	0	0
2021-2020	0	0
2020-2019	0	0
2019-2018	0	0
2018-2017	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]
2022-2021	0	0
2021-2020	0	0
2020-2019	0	0
2019-2018	0	0
2018-2017	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]
2022-2021	0	0
2021-2020	0	0
2020-2019	0	0
2019-2018	0	0
2018-2017	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]
2022-2021	0	0
2021-2020	0	0
2020-2019	0	0
2019-2018	0	0
2018-2017	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	0	0
Doubtful | Leases
Financing Receivable, Credit Quality Indicator [Line Items]
2022-2021	0	0
2021-2020	0	0
2020-2019	0	0
2019-2018	0	0
2018-2017	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	$ 0	$ 0