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Loans and Allowance for Credit Losses - Summary of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 4,730,139		$ 3,997,508
Loans held for sale	467		2,748
Loans and leases receivable gross excluding loans held for sale	4,729,672		3,994,760
Net deferred loan fees, premiums and discounts	9,849		1,985
Allowance for credit losses	58,777	$ 59,075	54,655	$ 53,983	$ 54,597	$ 41,910
Net loans	4,661,046		3,938,120
Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	3,242,426		2,789,827
Construction and Land Development | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	142,951		145,156
Allowance for credit losses	2,143	2,042	1,743	2,109	1,795	1,666
Agricultural | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	360,875		279,001
Allowance for credit losses	1,438	2,112	1,257	1,257	1,665	1,084
Commercial | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,002,969		1,666,764
Allowance for credit losses	28,061	28,856	26,246	25,580	25,664	19,660
Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	160,351		151,344
Allowance for credit losses	678	886	983	816	906	1,526
Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,066,197		834,061
Allowance for credit losses	20,441	19,496	19,241	18,608	19,842	13,485
Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	100,724		78,538
Allowance for credit losses	2,250	2,160	2,855	2,953	2,155	2,167
All Other Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	160,441		143,738
1-4 Family | Residential Properties | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	436,506		399,932
Allowance for credit losses	3,766	$ 3,523	2,330	$ 2,660	$ 2,570	$ 2,322
Multifamily | Residential Properties | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 299,125		$ 298,974

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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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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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