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Loans and Allowance for Credit Losses - Balance of Each Major Product Type (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Subtotal	$ 3,268,557		$ 3,083,976
Net deferred loan fees	(2,266)		(2,257)
Loans held for investment	3,266,291		3,081,719
Allowance for credit losses	(35,406)	$ (34,653)	(34,431)	$ (33,984)	$ (34,172)	$ (28,389)
Loans held for investment, net of allowance for credit losses	3,230,885		3,047,288
Commercial
Financing Receivable, Past Due [Line Items]
Subtotal	2,774,001		2,685,419
Loans held for investment	2,771,229		2,682,711
Allowance for credit losses	(24,708)	(28,895)	(29,015)	(27,553)	(27,119)	(19,216)
Commercial land and development
Financing Receivable, Past Due [Line Items]
Subtotal	4,766		15,551
Loans held for investment	4,772		15,534
Allowance for credit losses	(72)	(164)	(178)	(184)	(226)	(54)
Commercial construction
Financing Receivable, Past Due [Line Items]
Subtotal	72,444		62,863
Loans held for investment	72,140		62,544
Allowance for credit losses	(1,097)	(697)	(718)	(1,212)	(1,438)	(645)
Residential construction
Financing Receivable, Past Due [Line Items]
Subtotal	9,011		15,456
Loans held for investment	9,013		15,452
Allowance for credit losses	(100)	(114)	(89)	(217)	(175)	(49)
Residential
Financing Receivable, Past Due [Line Items]
Subtotal	29,641		25,893
Loans held for investment	29,666		25,922
Allowance for credit losses	(195)	(164)	(151)	(152)	(181)	(175)
Farmland
Financing Receivable, Past Due [Line Items]
Subtotal	48,852		51,669
Loans held for investment	48,831		51,646
Allowance for credit losses	(402)	(438)	(399)	(236)	(219)	(644)
Secured
Financing Receivable, Past Due [Line Items]
Subtotal	154,080		165,109
Loans held for investment	154,626		165,600
Allowance for credit losses	(7,386)	(3,262)	(3,314)	(3,751)	(4,258)	(7,098)
Unsecured
Financing Receivable, Past Due [Line Items]
Subtotal	23,198		23,850
Loans held for investment	23,213		23,857
Allowance for credit losses	(214)	(259)	(189)	(209)	(152)	(116)
Consumer and other
Financing Receivable, Past Due [Line Items]
Subtotal	152,564		38,166
Loans held for investment	152,801		38,453
Allowance for credit losses	$ (1,232)	$ (660)	$ (378)	$ (470)	$ (404)	$ (347)

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