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Loans and Allowance for Credit Losses - Summary of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 5,605,311		$ 5,633,562
Loans held for sale	7,764		4,980
Loans and leases receivable gross excluding loans held for sale	5,597,547		5,628,582
Net deferred loan fees, premiums and discounts	44,694		52,997
Allowance for credit losses	68,312	$ 67,936	68,675	$ 58,719	$ 58,223	$ 59,093
Net loans	5,484,541		5,506,910
Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	3,869,318		3,886,972
Construction and Land Development | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	197,036		207,033
Allowance for credit losses	2,646	2,701	2,918	2,208	2,426	2,250
Agricultural | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	387,741		392,265
Allowance for credit losses	1,372	1,358	1,366	1,370	1,404	1,433
Commercial | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,433,949		2,416,294
Allowance for credit losses	32,918	32,537	31,758	28,014	27,327	28,157
Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	213,889		196,202
Allowance for credit losses	885	778	705	524	580	585
Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,274,672		1,273,637
Allowance for credit losses	24,931	24,631	25,450	21,544	21,142	20,808
Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	71,623		92,142
Allowance for credit losses	1,980	2,153	2,258	1,812	1,924	2,118
All Other Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	175,809		184,609
1-4 Family | Residential Properties | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	514,034		549,843
Allowance for credit losses	3,580	$ 3,778	4,220	$ 3,247	$ 3,420	$ 3,742
Multifamily | Residential Properties | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 336,558		$ 321,537

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes Loans held-for-sale and loans and leases covered under loss sharing agreements.

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