Loans - Age Analysis (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	$ 7,568,826	$ 5,976,148
Non-owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	2,873,824	2,316,284
Owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,141,290	908,449
Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,186,036	972,233
Non-owner occupied residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	222,597	177,097
Commercial, industrial and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	613,228	462,406
Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	381,109	302,228
Equipment finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	137,999	123,212
Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	690,453	438,710
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	322,290	275,529
Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	7,548,498	5,963,596
Current | Non-owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	2,873,092	2,312,557
Current | Owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,131,553	905,751
Current | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,186,036	972,233
Current | Non-owner occupied residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	221,212	174,245
Current | Commercial, industrial and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	609,403	461,659
Current | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	381,109	302,228
Current | Equipment finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	137,172	122,923
Current | Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	687,242	437,574
Current | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	321,679	274,426
30 - 59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	4,621	1,345
30 - 59 Days | Non-owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	421	0
30 - 59 Days | Owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,051	20
30 - 59 Days | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	0	0
30 - 59 Days | Non-owner occupied residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	517	0
30 - 59 Days | Commercial, industrial and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	116	154
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	607	211
30 - 59 Days | Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,391	255
30 - 59 Days | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	518	705
60 - 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	9,006	1,094
60 - 89 Days | Non-owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	0	718
60 - 89 Days | Owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	8,198	0
60 - 89 Days | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	0	0
60 - 89 Days | Non-owner occupied residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	0	136
60 - 89 Days | Commercial, industrial and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	141	0
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	173	41
60 - 89 Days | Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	490	64
60 - 89 Days | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	4	135
Greater than 89 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	6,701	10,113
Greater than 89 days | Non-owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	311	3,009
Greater than 89 days | Owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	488	2,678
Greater than 89 days | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	0	0
Greater than 89 days | Non-owner occupied residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	868	2,716
Greater than 89 days | Commercial, industrial and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	3,568	593
Greater than 89 days | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	0	0
Greater than 89 days | Equipment finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	47	37
Greater than 89 days | Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,330	817
Greater than 89 days | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	89	263
Total past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	20,328	12,552
Total past due | Non-owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	732	3,727
Total past due | Owner occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	9,737	2,698
Total past due | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	0	0
Total past due | Non-owner occupied residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	1,385	2,852
Total past due | Commercial, industrial and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	3,825	747
Total past due | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	0	0
Total past due | Equipment finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	827	289
Total past due | Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	3,211	1,136
Total past due | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of deferred fees	$ 611	$ 1,103