Loans and Allowance for Credit Losses on Loans HFI - Schedule of Loans Outstanding by Class of Financing Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Gross loans	$ 12,297,600		$ 9,602,384
Less: Allowance for credit losses on loans HFI	(184,993)	$ (148,948)	(151,942)	$ (156,260)	$ (155,055)	$ (150,326)
Net loans held for investment	12,112,607		9,450,442
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Gross loans	2,155,105		1,691,213
Less: Allowance for credit losses on loans HFI	(26,075)	(20,271)	(16,667)	(24,133)	(22,530)	(19,599)
Construction
Financing Receivable, Past Due [Line Items]
Gross loans	1,195,392		1,087,732
Less: Allowance for credit losses on loans HFI	(27,857)	(21,848)	(31,698)	(30,558)	(34,170)	(35,372)
Residential real estate: | 1-to-4 family mortgage
Financing Receivable, Past Due [Line Items]
Gross loans	1,852,626		1,616,754
Less: Allowance for credit losses on loans HFI	(33,059)	(30,262)	(25,340)	(25,979)	(25,631)	(26,505)
Residential real estate: | Residential line of credit
Financing Receivable, Past Due [Line Items]
Gross loans	707,303		602,475
Less: Allowance for credit losses on loans HFI	(10,458)	(8,671)	(10,952)	(10,724)	(10,097)	(9,468)
Residential real estate: | Multi-family mortgage
Financing Receivable, Past Due [Line Items]
Gross loans	736,424		653,769
Less: Allowance for credit losses on loans HFI	(11,815)	(10,894)	(10,512)	(9,644)	(8,810)	(8,842)
Commercial real estate: | Owner-occupied
Financing Receivable, Past Due [Line Items]
Gross loans	2,124,920		1,357,568
Less: Allowance for credit losses on loans HFI	(20,360)	(11,939)	(11,993)	(11,567)	(11,312)	(10,653)
Commercial real estate: | Non-owner occupied
Financing Receivable, Past Due [Line Items]
Gross loans	2,890,233		2,099,129
Less: Allowance for credit losses on loans HFI	(34,073)	(26,303)	(25,531)	(24,641)	(24,543)	(22,965)
Consumer and other
Financing Receivable, Past Due [Line Items]
Gross loans	635,597		493,744
Less: Allowance for credit losses on loans HFI	$ (21,296)	$ (18,760)	$ (19,249)	$ (19,014)	$ (17,962)	$ (16,922)