Loans and Allowance for Credit Losses - Analysis of Aging by Class of Financing Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Loans	$ 8,004,976	$ 7,604,662
90 days or  more and accruing interest	12,873	11,735
Non-accrual loans	27,826	35,568
30-89 days past due
Financing Receivable, Past Due [Line Items]
Loans	23,915	26,450
Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans	7,940,362	7,530,909
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	1,380,600	1,290,565
90 days or  more and accruing interest	58	63
Non-accrual loans	3,882	1,520
Commercial and industrial | 30-89 days past due
Financing Receivable, Past Due [Line Items]
Loans	1,543	1,030
Commercial and industrial | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans	1,375,117	1,287,952
Construction
Financing Receivable, Past Due [Line Items]
Loans	1,468,811	1,327,659
90 days or  more and accruing interest	0	718
Non-accrual loans	679	3,622
Construction | 30-89 days past due
Financing Receivable, Past Due [Line Items]
Loans	2,622	4,852
Construction | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans	1,465,510	1,318,467
Residential real estate: | 1-to-4 family mortgage
Financing Receivable, Past Due [Line Items]
Loans	1,346,349	1,270,467
90 days or  more and accruing interest	11,724	9,363
Non-accrual loans	3,299	4,593
Residential real estate: | 1-to-4 family mortgage | 30-89 days past due
Financing Receivable, Past Due [Line Items]
Loans	13,508	11,007
Residential real estate: | 1-to-4 family mortgage | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans	1,317,818	1,245,504
Residential real estate: | Residential line of credit
Financing Receivable, Past Due [Line Items]
Loans	392,740	383,039
90 days or  more and accruing interest	0	0
Non-accrual loans	1,577	1,736
Residential real estate: | Residential line of credit | 30-89 days past due
Financing Receivable, Past Due [Line Items]
Loans	536	319
Residential real estate: | Residential line of credit | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans	390,627	380,984
Residential real estate: | Multi-family mortgage
Financing Receivable, Past Due [Line Items]
Loans	400,501	326,551
90 days or  more and accruing interest	0	0
Non-accrual loans	48	49
Residential real estate: | Multi-family mortgage | 30-89 days past due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Residential real estate: | Multi-family mortgage | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans	400,453	326,502
Commercial real estate: | Owner occupied
Financing Receivable, Past Due [Line Items]
Loans	978,436	951,582
90 days or  more and accruing interest	0	0
Non-accrual loans	6,989	6,710
Commercial real estate: | Owner occupied | 30-89 days past due
Financing Receivable, Past Due [Line Items]
Loans	415	1,417
Commercial real estate: | Owner occupied | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans	971,032	943,455
Commercial real estate: | Non-owner occupied
Financing Receivable, Past Due [Line Items]
Loans	1,706,546	1,730,165
90 days or  more and accruing interest	0	0
Non-accrual loans	7,185	14,084
Commercial real estate: | Non-owner occupied | 30-89 days past due
Financing Receivable, Past Due [Line Items]
Loans	986	427
Commercial real estate: | Non-owner occupied | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans	1,698,375	1,715,654
Consumer and other
Financing Receivable, Past Due [Line Items]
Loans	330,993	324,634
90 days or  more and accruing interest	1,091	1,591
Non-accrual loans	4,167	3,254
Consumer and other | 30-89 days past due
Financing Receivable, Past Due [Line Items]
Loans	4,305	7,398
Consumer and other | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans	$ 321,430	$ 312,391