Loans - Age Analysis (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	$ 8,101,287	$ 7,866,050
Non-owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	2,991,124	2,906,014
Owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,201,049	1,246,189
Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,314,255	1,260,814
Non-owner occupied residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	205,818	218,026
Commercial, industrial and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	594,790	606,711
Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	354,918	380,100
Equipment finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	173,469	151,574
Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	922,109	765,552
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	343,755	331,070
Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	8,080,929	7,842,175
Current | Non-owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	2,990,533	2,905,049
Current | Owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,192,553	1,235,134
Current | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,312,870	1,260,135
Current | Non-owner occupied residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	205,803	217,407
Current | Commercial, industrial and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	593,029	603,731
Current | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	354,918	379,120
Current | Equipment finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	172,290	150,842
Current | Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	917,114	760,638
Current | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	341,819	330,119
30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	5,063	7,799
30 - 59 Days | Non-owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	0	346
30 - 59 Days | Owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	98	2,854
30 - 59 Days | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,119	0
30 - 59 Days | Non-owner occupied residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	15	178
30 - 59 Days | Commercial, industrial and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	14	55
30 - 59 Days | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	0	0
30 - 59 Days | Equipment finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	757	494
30 - 59 Days | Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	2,669	3,031
30 - 59 Days | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	391	841
60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	3,333	1,730
60 - 89 Days | Non-owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	0	0
60 - 89 Days | Owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,692	477
60 - 89 Days | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	0	679
60 - 89 Days | Non-owner occupied residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	0	0
60 - 89 Days | Commercial, industrial and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	76	3
60 - 89 Days | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	0	0
60 - 89 Days | Equipment finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	276	238
60 - 89 Days | Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,215	271
60 - 89 Days | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	74	62
Greater than 89 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	11,962	14,346
Greater than 89 days | Non-owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	591	619
Greater than 89 days | Owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	6,706	7,724
Greater than 89 days | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	266	0
Greater than 89 days | Non-owner occupied residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	0	441
Greater than 89 days | Commercial, industrial and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,671	2,922
Greater than 89 days | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	0	980
Greater than 89 days | Equipment finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	146	0
Greater than 89 days | Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,111	1,612
Greater than 89 days | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,471	48
Total past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	20,358	23,875
Total past due | Non-owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	591	965
Total past due | Owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	8,496	11,055
Total past due | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,385	679
Total past due | Non-owner occupied residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	15	619
Total past due | Commercial, industrial and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,761	2,980
Total past due | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	0	980
Total past due | Equipment finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,179	732
Total past due | Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	4,995	4,914
Total past due | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	$ 1,936	$ 951