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Loans - Components of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 4,069,355		$ 3,977,900
Less: Unearned Income	(8,206)		(6,818)
Allowance for Credit Losses	(44,124)	$ (43,946)	(43,765)	$ (44,646)	$ (44,266)	$ (44,168)
Loans, Net	4,017,025		3,927,317
Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	591,277		589,541
Allowance for Credit Losses	(6,974)	(7,200)	(7,921)	(12,958)	(13,567)	(13,749)
Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,179,981		2,121,835
Allowance for Credit Losses	(26,656)	(26,598)	(25,923)	(22,900)	(21,834)	(21,598)
Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	417,473		423,803
Allowance for Credit Losses	(3,901)	(3,697)	(3,837)	(3,786)	(3,956)	(4,188)
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	78,827		71,988
Allowance for Credit Losses	(396)	(368)	(346)	(254)	(235)	(209)
Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	333,829		299,685
Allowance for Credit Losses	(2,130)	(2,058)	(1,834)	(1,447)	(1,436)	(1,344)
Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	82,882		87,853
Allowance for Credit Losses	(740)	(722)	(759)	(665)	(640)	(595)
Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	22,671		20,351
Allowance for Credit Losses	(466)	(413)	(383)	(319)	(288)	(257)
Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	362,415		362,844
Allowance for Credit Losses	(2,861)	$ (2,890)	(2,762)	$ (2,317)	$ (2,310)	$ (2,228)
Commercial: | Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	591,277		589,541
Commercial: | Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,179,981		2,121,835
Commercial: | Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	417,473		423,803
Commercial: | Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	78,827		71,988
Retail: | Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	333,829		299,685
Retail: | Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	82,882		87,853
Retail: | Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	22,671		20,351
Retail: | Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 362,415		$ 362,844

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
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Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

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Amortized cost excluding accrued interest, after allowance for credit loss, of financing receivable. Excludes net investment in lease.

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

+ References

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Amount of unamortized loan commitment, origination, and other costs (fees) and purchase premium (discount) on financing receivable recognized as adjustment to yield. Excludes financing receivable covered under loss sharing agreement.

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