Loans and Allowance for Credit Losses - Balance of Each Major Product Type (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Jan. 01, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Subtotal	$ 2,871,952		$ 2,793,466
Less: Net deferred loan fees	2,104		2,140
Less: Allowance for credit losses	34,172	$ 28,389	28,389	$ 23,904	$ 23,243
Loans held for investment, net of allowance for credit losses	2,835,676		2,762,937
Commercial
Financing Receivable, Past Due [Line Items]
Subtotal	2,442,520		2,394,674
Less: Allowance for credit losses	26,846		19,216	13,868	12,869
Commercial land and development
Financing Receivable, Past Due [Line Items]
Subtotal	15,475		7,477
Less: Allowance for credit losses	224		54	66	50
Commercial construction
Financing Receivable, Past Due [Line Items]
Subtotal	98,415		88,669
Less: Allowance for credit losses	1,423		645	430	371
Residential construction
Financing Receivable, Past Due [Line Items]
Subtotal	9,410		6,693
Less: Allowance for credit losses	173		49	40	50
Residential
Financing Receivable, Past Due [Line Items]
Subtotal	23,862		24,230
Less: Allowance for credit losses	179		175	208	192
Farmland
Financing Receivable, Past Due [Line Items]
Subtotal	51,616		52,478
Less: Allowance for credit losses	217		644	611	645
Secured
Financing Receivable, Past Due [Line Items]
Subtotal	173,500		165,186
Less: Allowance for credit losses	4,215		7,098	7,039	6,859
Unsecured
Financing Receivable, Past Due [Line Items]
Subtotal	24,776		25,431
Less: Allowance for credit losses	150		116	246	207
Consumer and other
Financing Receivable, Past Due [Line Items]
Subtotal	32,378		28,628
Less: Allowance for credit losses	$ 400		$ 347	$ 1,088	$ 889