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Loans - Aging of Past Due Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Total	$ 4,069,355	$ 3,977,900
Total Past Due
Financing Receivable, Past Due [Line Items]
Total	20,152	21,865
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	9,269	11,253
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	2,988	3,378
Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	7,895	7,234
Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total	4,049,203	3,956,035
Commercial and Industrial Loans
Financing Receivable, Past Due [Line Items]
Total	591,277	589,541
Commercial and Industrial Loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	2,781	4,388
Commercial and Industrial Loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	794	832
Commercial and Industrial Loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	0	257
Commercial and Industrial Loans | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	1,987	3,299
Commercial and Industrial Loans | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total	588,496	585,153
Commercial Real Estate Loans
Financing Receivable, Past Due [Line Items]
Total	2,179,981	2,121,835
Commercial Real Estate Loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	2,850	2,637
Commercial Real Estate Loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	745	1,215
Commercial Real Estate Loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	0	484
Commercial Real Estate Loans | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	2,105	938
Commercial Real Estate Loans | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total	2,177,131	2,119,198
Agricultural Loans
Financing Receivable, Past Due [Line Items]
Total	417,473	423,803
Agricultural Loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	861	750
Agricultural Loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	60	5
Agricultural Loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	0	248
Agricultural Loans | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	801	497
Agricultural Loans | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total	416,612	423,053
Leases
Financing Receivable, Past Due [Line Items]
Total	78,827	71,988
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	78,827	71,988
Home Equity Loans
Financing Receivable, Past Due [Line Items]
Total	333,829	299,685
Home Equity Loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	3,596	2,620
Home Equity Loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	2,482	1,016
Home Equity Loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	319	571
Home Equity Loans | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	795	1,033
Home Equity Loans | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total	330,233	297,065
Consumer Loans
Financing Receivable, Past Due [Line Items]
Total	82,882	87,853
Consumer Loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	1,004	852
Consumer Loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	640	658
Consumer Loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	36	84
Consumer Loans | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	328	110
Consumer Loans | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total	81,878	87,001
Credit Cards
Financing Receivable, Past Due [Line Items]
Total	22,671	20,351
Credit Cards | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	255	394
Credit Cards | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	111	165
Credit Cards | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	102	87
Credit Cards | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	42	142
Credit Cards | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total	22,416	19,957
Residential Mortgage Loans
Financing Receivable, Past Due [Line Items]
Total	362,415	362,844
Residential Mortgage Loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	8,805	10,224
Residential Mortgage Loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	4,437	7,362
Residential Mortgage Loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	2,531	1,647
Residential Mortgage Loans | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	1,837	1,215
Residential Mortgage Loans | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total	$ 353,610	$ 352,620

X

- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7))
-Publisher FASB
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Publisher FASB
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-Topic 326
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