Loans Receivable, Net - Aging of Recorded Investment in Past Due Loans Excluding PCI Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Total loans receivable	$ 9,108,976	$ 8,622,870
Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	25,471	22,728
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	17,235	12,385
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	1,456	2,161
90 Days or Greater Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	6,780	8,182
Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	9,083,505	8,600,142
Commercial real estate – investor
Financing Receivable, Past Due [Line Items]
Total loans receivable	4,607,880	4,378,061
Commercial real estate – investor | Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	3,846	3,528
Commercial real estate – investor | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	2,109	1,717
Commercial real estate – investor | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	74	102
Commercial real estate – investor | 90 Days or Greater Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	1,663	1,709
Commercial real estate – investor | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	4,604,034	4,374,533
Commercial real estate – owner occupied
Financing Receivable, Past Due [Line Items]
Total loans receivable	1,057,246	1,055,065
Commercial real estate – owner occupied | Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	4,856	1,174
Commercial real estate – owner occupied | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	4,465	599
Commercial real estate – owner occupied | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	18	0
Commercial real estate – owner occupied | 90 Days or Greater Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	373	575
Commercial real estate – owner occupied | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	1,052,390	1,053,891
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total loans receivable	502,739	449,224
Commercial and industrial | Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	465	453
Commercial and industrial | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	66	25
Commercial and industrial | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	43	151
Commercial and industrial | 90 Days or Greater Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	356	277
Commercial and industrial | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	502,274	448,771
Residential real estate
Financing Receivable, Past Due [Line Items]
Total loans receivable	2,687,927	2,479,701
Residential real estate | Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	13,104	13,966
Residential real estate | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	9,816	9,705
Residential real estate | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	1,146	1,586
Residential real estate | 90 Days or Greater Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	2,142	2,675
Residential real estate | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	2,674,823	2,465,735
Other consumer
Financing Receivable, Past Due [Line Items]
Total loans receivable	253,184	260,819
Other consumer | Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	3,200	3,607
Other consumer | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	779	339
Other consumer | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	175	322
Other consumer | 90 Days or Greater Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	2,246	2,946
Other consumer | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total loans receivable	$ 249,984	$ 257,212