Loans and Allowance for Credit Losses - Analysis of Aging by Class of Financing Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 9,298,212	$ 7,604,662
90 days or  more and accruing interest	18,415	11,735
Nonaccrual loans	27,431	35,568
30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	31,296	26,450
Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	9,221,070	7,530,909
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,645,783	1,290,565
90 days or  more and accruing interest	136	63
Nonaccrual loans	1,307	1,520
Commercial and industrial | 30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,650	1,030
Commercial and industrial | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,642,690	1,287,952
Construction
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,657,488	1,327,659
90 days or  more and accruing interest	0	718
Nonaccrual loans	389	3,622
Construction | 30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,246	4,852
Construction | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,655,853	1,318,467
Residential real estate: | 1-to-4 family mortgage
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,573,121	1,270,467
90 days or  more and accruing interest	16,639	9,363
Nonaccrual loans	6,476	4,593
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	15,470	11,007
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	1,534,536	1,245,504
Residential real estate: | Residential line of credit
Financing Receivable, Past Due [Line Items]
Loans held for investment	496,660	383,039
90 days or  more and accruing interest	131	0
Nonaccrual loans	1,400	1,736
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	772	319
Residential real estate: | Residential line of credit | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	494,357	380,984
Residential real estate: | Multi-family mortgage
Financing Receivable, Past Due [Line Items]
Loans held for investment	479,572	326,551
90 days or  more and accruing interest	0	0
Nonaccrual loans	42	49
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	479,530	326,502
Commercial real estate: | Owner-occupied
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,114,580	951,582
90 days or  more and accruing interest	0	0
Nonaccrual loans	5,410	6,710
Commercial real estate: | Owner-occupied | 30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,948	1,417
Commercial real estate: | Owner-occupied | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,107,222	943,455
Commercial real estate: | Non-owner occupied
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,964,010	1,730,165
90 days or  more and accruing interest	0	0
Nonaccrual loans	5,956	14,084
Commercial real estate: | Non-owner occupied | 30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	102	427
Commercial real estate: | Non-owner occupied | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,957,952	1,715,654
Consumer and other
Financing Receivable, Past Due [Line Items]
Loans held for investment	366,998	324,634
90 days or  more and accruing interest	1,509	1,591
Nonaccrual loans	6,451	3,254
Consumer and other | 30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	10,108	7,398
Consumer and other | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 348,930	$ 312,391