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Loans and Allowance for Credit Losses on Loans HFI - Schedule of Loans Outstanding by Class of Financing Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Gross loans	$ 9,478,129		$ 9,408,783
Less: Allowance for credit losses on loans HFI	(156,260)	$ (155,055)	(150,326)	$ (146,134)	$ (140,664)	$ (134,192)
Net loans held for investment	9,321,869		9,258,457
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Gross loans	1,688,815		1,720,733
Less: Allowance for credit losses on loans HFI	(24,133)	(22,530)	(19,599)	(17,562)	(11,311)	(11,106)
Construction
Financing Receivable, Past Due [Line Items]
Gross loans	1,079,726		1,397,313
Less: Allowance for credit losses on loans HFI	(30,558)	(34,170)	(35,372)	(37,895)	(39,920)	(39,808)
Residential real estate: \| 1-to-4 family mortgage
Financing Receivable, Past Due [Line Items]
Gross loans	1,612,031		1,568,552
Less: Allowance for credit losses on loans HFI	(25,979)	(25,631)	(26,505)	(25,695)	(27,407)	(26,141)
Residential real estate: \| Residential line of credit
Financing Receivable, Past Due [Line Items]
Gross loans	591,049		530,912
Less: Allowance for credit losses on loans HFI	(10,724)	(10,097)	(9,468)	(9,163)	(9,185)	(7,494)
Residential real estate: \| Multi-family mortgage
Financing Receivable, Past Due [Line Items]
Gross loans	654,188		603,804
Less: Allowance for credit losses on loans HFI	(9,644)	(8,810)	(8,842)	(6,848)	(6,828)	(6,490)
Commercial real estate: \| Owner-occupied
Financing Receivable, Past Due [Line Items]
Gross loans	1,324,208		1,232,071
Less: Allowance for credit losses on loans HFI	(11,567)	(11,312)	(10,653)	(10,526)	(8,467)	(7,783)
Commercial real estate: \| Non-owner occupied
Financing Receivable, Past Due [Line Items]
Gross loans	2,048,036		1,943,525
Less: Allowance for credit losses on loans HFI	(24,641)	(24,543)	(22,965)	(22,747)	(22,877)	(21,916)
Consumer and other
Financing Receivable, Past Due [Line Items]
Gross loans	480,076		411,873
Less: Allowance for credit losses on loans HFI	$ (19,014)	$ (17,962)	$ (16,922)	$ (15,698)	$ (14,669)	$ (13,454)