Loans and Allowance for Credit Losses on Loans HFI - Schedule of Loans Outstanding by Class of Financing Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Gross loans	$ 9,288,909	$ 9,408,783
Less: Allowance for credit losses on loans HFI	(151,667)	(150,326)	$ (138,809)	$ (134,192)
Net loans held for investment	9,137,242	9,258,457
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Gross loans	1,621,611	1,720,733
Less: Allowance for credit losses on loans HFI	(17,272)	(19,599)	(11,117)	(11,106)
Construction
Financing Receivable, Past Due [Line Items]
Gross loans	1,268,883	1,397,313
Less: Allowance for credit losses on loans HFI	(37,308)	(35,372)	(41,025)	(39,808)
Residential real estate: | 1-to-4 family mortgage
Financing Receivable, Past Due [Line Items]
Gross loans	1,577,824	1,568,552
Less: Allowance for credit losses on loans HFI	(26,128)	(26,505)	(27,213)	(26,141)
Residential real estate: | Residential line of credit
Financing Receivable, Past Due [Line Items]
Gross loans	549,306	530,912
Less: Allowance for credit losses on loans HFI	(9,918)	(9,468)	(9,034)	(7,494)
Residential real estate: | Multi-family mortgage
Financing Receivable, Past Due [Line Items]
Gross loans	615,081	603,804
Less: Allowance for credit losses on loans HFI	(8,973)	(8,842)	(6,619)	(6,490)
Commercial real estate: | Owner-occupied
Financing Receivable, Past Due [Line Items]
Gross loans	1,236,007	1,232,071
Less: Allowance for credit losses on loans HFI	(10,749)	(10,653)	(7,952)	(7,783)
Commercial real estate: | Non-owner occupied
Financing Receivable, Past Due [Line Items]
Gross loans	1,991,526	1,943,525
Less: Allowance for credit losses on loans HFI	(23,949)	(22,965)	(21,868)	(21,916)
Consumer and other
Financing Receivable, Past Due [Line Items]
Gross loans	428,671	411,873
Less: Allowance for credit losses on loans HFI	$ (17,370)	$ (16,922)	$ (13,981)	$ (13,454)