Loans Receivable, Net - Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment and Based on Impairment Method Excluding PCI Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Allowance for Loan and Lease Losses [Roll Forward]
Balance at period start	$ 60,735	$ 16,852
Initial allowance for credit losses on PCD loans		2,639
Credit loss benefit	(12,346)	57,402
Charge-offs	(1,031)	(20,184)
Recoveries	1,492	1,325
Balance at period end	48,850	60,735
Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at period start		2,701
Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Balance at period start	5,390	1,458
Initial allowance for credit losses on PCD loans		1,221
Credit loss benefit	(321)	1,039
Charge-offs	(154)	(890)
Recoveries	124	146
Balance at period end	5,039	5,390
Commercial and industrial | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at period start		2,416
Commercial real estate – owner occupied
Allowance for Loan and Lease Losses [Roll Forward]
Balance at period start	15,054	2,893
Initial allowance for credit losses on PCD loans		26
Credit loss benefit	(9,190)	15,007
Charge-offs	(65)	(1,769)
Recoveries	85	6
Balance at period end	5,884	15,054
Commercial real estate – owner occupied | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at period start		(1,109)
Commercial Real Estate - Investor
Allowance for Loan and Lease Losses [Roll Forward]
Balance at period start	26,703	9,883
Initial allowance for credit losses on PCD loans		260
Credit loss benefit	(974)	34,935
Charge-offs	(345)	(13,081)
Recoveries	120	101
Balance at period end	25,504	26,703
Commercial Real Estate - Investor | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at period start		(5,395)
Residential real estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance at period start	11,818	2,002
Initial allowance for credit losses on PCD loans		109
Credit loss benefit	(761)	8,191
Charge-offs	(254)	(3,200)
Recoveries	352	883
Balance at period end	11,155	11,818
Residential real estate | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at period start		3,833
Other consumer
Allowance for Loan and Lease Losses [Roll Forward]
Balance at period start	1,770	591
Initial allowance for credit losses on PCD loans		1,023
Credit loss benefit	(1,100)	(1,770)
Charge-offs	(213)	(1,244)
Recoveries	811	189
Balance at period end	1,268	1,770
Other consumer | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at period start		2,981
Unallocated
Allowance for Loan and Lease Losses [Roll Forward]
Balance at period start	0	25
Initial allowance for credit losses on PCD loans		0
Credit loss benefit	0	0
Charge-offs	0	0
Recoveries	0	0
Balance at period end	$ 0	0
Unallocated | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at period start		$ (25)