Loans and Allowance for Credit Losses on Loans HFI - Schedule of Loans Outstanding by Class of Financing Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Jun. 30, 2026	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024
Financing Receivable, Past Due [Line Items]
Gross loans	$ 13,179,564		$ 12,383,626
Less: Allowance for credit losses on loans HFI	(193,960)	$ (194,010)	(185,983)	$ (184,993)	$ (148,948)	$ (151,942)
Net loans held for investment	12,985,604		12,197,643
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Gross loans	2,258,655		2,181,935
Less: Allowance for credit losses on loans HFI	(25,831)	(26,275)	(24,130)	(26,075)	(20,271)	(16,667)
Construction
Financing Receivable, Past Due [Line Items]
Gross loans	1,177,433		1,188,494
Less: Allowance for credit losses on loans HFI	(26,772)	(27,457)	(25,633)	(27,857)	(21,848)	(31,698)
Residential real estate: \| 1-to-4 family mortgage
Financing Receivable, Past Due [Line Items]
Gross loans	2,051,105		1,838,122
Less: Allowance for credit losses on loans HFI	(36,023)	(33,846)	(33,218)	(33,059)	(30,262)	(25,340)
Residential real estate: \| Residential line of credit
Financing Receivable, Past Due [Line Items]
Gross loans	812,771		741,309
Less: Allowance for credit losses on loans HFI	(9,997)	(10,186)	(10,589)	(10,458)	(8,671)	(10,952)
Residential real estate: \| Multi-family mortgage
Financing Receivable, Past Due [Line Items]
Gross loans	809,083		745,360
Less: Allowance for credit losses on loans HFI	(11,725)	(11,566)	(12,260)	(11,815)	(10,894)	(10,512)
Commercial real estate: \| Owner-occupied
Financing Receivable, Past Due [Line Items]
Gross loans	2,282,155		2,148,870
Less: Allowance for credit losses on loans HFI	(19,538)	(19,961)	(21,609)	(20,360)	(11,939)	(11,993)
Commercial real estate: \| Non-owner occupied
Financing Receivable, Past Due [Line Items]
Gross loans	3,079,035		2,900,499
Less: Allowance for credit losses on loans HFI	(41,952)	(42,003)	(36,235)	(34,073)	(26,303)	(25,531)
Consumer and other
Financing Receivable, Past Due [Line Items]
Gross loans	709,327		639,037
Less: Allowance for credit losses on loans HFI	$ (22,122)	$ (22,716)	$ (22,309)	$ (21,296)	$ (18,760)	$ (19,249)