Loans and Allowance for Credit Losses on Loans HFI - Schedule of Analysis of Aging by Class of Financing Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 9,287,225	$ 9,298,212
90 days or  more and accruing interest	11,649	18,415
Nonaccrual loans	42,878	27,431
30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	40,830	31,296
Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	9,191,868	9,221,070
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,667,857	1,645,783
90 days or  more and accruing interest	38	136
Nonaccrual loans	12,070	1,307
Commercial and industrial | 30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	6,522	1,650
Commercial and industrial | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,649,227	1,642,690
Construction
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,532,306	1,657,488
90 days or  more and accruing interest	0	0
Nonaccrual loans	2,454	389
Construction | 30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	2,301	1,246
Construction | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,527,551	1,655,853
Residential real estate: | 1-to-4 family mortgage
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,553,096	1,573,121
90 days or  more and accruing interest	8,346	16,639
Nonaccrual loans	9,674	6,476
Residential real estate: | 1-to-4 family mortgage | 30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	20,003	15,470
Residential real estate: | 1-to-4 family mortgage | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,515,073	1,534,536
Residential real estate: | Residential line of credit
Financing Receivable, Past Due [Line Items]
Loans held for investment	517,082	496,660
90 days or  more and accruing interest	1,341	131
Nonaccrual loans	1,149	1,400
Residential real estate: | Residential line of credit | 30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,440	772
Residential real estate: | Residential line of credit | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	513,152	494,357
Residential real estate: | Multi-family mortgage
Financing Receivable, Past Due [Line Items]
Loans held for investment	501,323	479,572
90 days or  more and accruing interest	0	0
Nonaccrual loans	35	42
Residential real estate: | Multi-family mortgage | 30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	0	0
Residential real estate: | Multi-family mortgage | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	501,288	479,530
Commercial real estate: | Owner-occupied
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,206,351	1,114,580
90 days or  more and accruing interest	0	0
Nonaccrual loans	3,521	5,410
Commercial real estate: | Owner-occupied | 30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	534	1,948
Commercial real estate: | Owner-occupied | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,202,296	1,107,222
Commercial real estate: | Non-owner occupied
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,911,913	1,964,010
90 days or  more and accruing interest	0	0
Nonaccrual loans	5,402	5,956
Commercial real estate: | Non-owner occupied | 30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	0	102
Commercial real estate: | Non-owner occupied | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,906,511	1,957,952
Consumer and other
Financing Receivable, Past Due [Line Items]
Loans held for investment	397,297	366,998
90 days or  more and accruing interest	1,924	1,509
Nonaccrual loans	8,573	6,451
Consumer and other | 30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	10,030	10,108
Consumer and other | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 376,770	$ 348,930