Loans - Aging of Past Due Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Total	$ 3,656,034	$ 3,007,926
Total Past Due
Financing Receivable, Past Due [Line Items]
Total	16,770	11,490
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	5,916	3,182
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	1,648	808
Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	9,206	7,500
Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total	3,639,264	2,996,436
Commercial and Industrial Loans
Financing Receivable, Past Due [Line Items]
Total	580,819	493,005
Commercial and Industrial Loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	9,045	6,159
Commercial and Industrial Loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	137	12
Commercial and Industrial Loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	1,235	0
Commercial and Industrial Loans | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	7,673	6,147
Commercial and Industrial Loans | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total	571,774	486,846
Commercial Real Estate Loans
Financing Receivable, Past Due [Line Items]
Total	1,938,528	1,530,677
Commercial Real Estate Loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	1,724	896
Commercial Real Estate Loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	956	0
Commercial Real Estate Loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	133	5
Commercial Real Estate Loans | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	635	891
Commercial Real Estate Loans | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total	1,936,804	1,529,781
Agricultural Loans
Financing Receivable, Past Due [Line Items]
Total	387,764	358,150
Agricultural Loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	1,005	0
Agricultural Loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	1,005	0
Agricultural Loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	0	0
Agricultural Loans | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	0	0
Agricultural Loans | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total	386,759	358,150
Leases
Financing Receivable, Past Due [Line Items]
Total	55,700	55,345
Leases | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	0	0
Leases | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	0	0
Leases | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	0	0
Leases | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	0	0
Leases | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total	55,700	55,345
Home Equity Loans
Financing Receivable, Past Due [Line Items]
Total	249,024	222,525
Home Equity Loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	734	479
Home Equity Loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	490	225
Home Equity Loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	28	229
Home Equity Loans | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	216	25
Home Equity Loans | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total	248,290	222,046
Consumer Loans
Financing Receivable, Past Due [Line Items]
Total	86,522	70,302
Consumer Loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	180	220
Consumer Loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	112	158
Consumer Loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	68	58
Consumer Loans | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	0	4
Consumer Loans | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total	86,342	70,082
Credit Cards
Financing Receivable, Past Due [Line Items]
Total	15,537	14,357
Credit Cards | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	124	134
Credit Cards | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	56	61
Credit Cards | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	7	9
Credit Cards | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	61	64
Credit Cards | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total	15,413	14,223
Residential Mortgage Loans
Financing Receivable, Past Due [Line Items]
Total	342,140	263,565
Residential Mortgage Loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	3,958	3,602
Residential Mortgage Loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	3,160	2,726
Residential Mortgage Loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	177	507
Residential Mortgage Loans | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	621	369
Residential Mortgage Loans | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total	$ 338,182	$ 259,963