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	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Allowance for credit losses on loans
Balance at beginning of period	$ 52,061	$ 53,876	$ 48,850	$ 60,735
Credit loss expense (benefit)	1,208	(4,109)	4,336	(11,024)
Charge-offs	(5)	(163)	(435)	(939)
Recoveries	257	549	770	1,381
Balance at end of period	53,521	50,153	53,521	50,153
Commercial Real Estate – Investor
Allowance for credit losses on loans
Balance at beginning of period	22,608	33,037	25,504	26,703
Credit loss expense (benefit)	82	(9,902)	(2,865)	(3,336)
Charge-offs	(3)	0	(3)	(345)
Recoveries	3	5	54	118
Balance at end of period	22,690	23,140	22,690	23,140
Commercial real estate – owner occupied
Allowance for credit losses on loans
Balance at beginning of period	5,021	6,350	5,884	15,054
Credit loss expense (benefit)	(1,047)	515	(2,003)	(8,225)
Charge-offs	0	(64)	(18)	(64)
Recoveries	48	26	159	62
Balance at end of period	4,022	6,827	4,022	6,827
Commercial and industrial
Allowance for credit losses on loans
Balance at beginning of period	5,240	4,404	5,039	5,390
Credit loss expense (benefit)	554	1,962	720	958
Charge-offs	0	(50)	0	(83)
Recoveries	69	50	104	101
Balance at end of period	5,863	6,366	5,863	6,366
Residential Real Estate
Allowance for credit losses on loans
Balance at beginning of period	18,196	8,818	11,155	11,818
Credit loss expense (benefit)	1,618	3,081	8,612	284
Charge-offs	0	(12)	(56)	(254)
Recoveries	44	292	147	331
Balance at end of period	19,858	12,179	19,858	12,179
Other consumer
Allowance for credit losses on loans
Balance at beginning of period	996	1,267	1,268	1,770
Credit loss expense (benefit)	1	235	(128)	(705)
Charge-offs	(2)	(37)	(358)	(193)
Recoveries	93	176	306	769
Balance at end of period	$ 1,088	$ 1,641	$ 1,088	$ 1,641