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Loans and Allowance for Credit Losses - Summary 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]
Gross loans	$ 5,655,759		$ 5,633,562
Loans held for sale	8,085		4,980
Loans and leases receivable gross excluding loans held for sale	5,647,674		5,628,582
Net deferred loan fees, premiums and discounts	41,168		52,997
Allowance for credit losses	68,774	$ 68,312	68,675	$ 68,241	$ 58,719	$ 59,093
Net loans	5,537,732		5,506,910
Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	3,894,661		3,886,972
Construction and Land Development | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	192,327		207,033
Allowance for credit losses	2,674	2,646	2,918	2,735	2,208	2,250
Agricultural | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	385,324		392,265
Allowance for credit losses	1,342	1,372	1,366	1,397	1,370	1,433
Commercial | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,465,488		2,416,294
Allowance for credit losses	32,825	32,918	31,758	31,823	28,014	28,157
Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	233,074		196,202
Allowance for credit losses	860	885	705	640	524	585
Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,288,940		1,273,637
Allowance for credit losses	25,569	24,931	25,450	25,595	21,544	20,808
Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	63,867		92,142
Allowance for credit losses	1,823	1,980	2,258	1,981	1,812	2,118
All Other Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	175,217		184,609
1-4 Family | Residential Properties | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	511,404		549,843
Allowance for credit losses	3,681	$ 3,580	4,220	$ 4,070	$ 3,247	$ 3,742
Multifamily | Residential Properties | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 340,118		$ 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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