Loans Receivable - Changes in the Allowance for Losses on Loans Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Changes in allowance for losses on allocated loans receivable
Beginning balance	$ 102,241	$ 134,427	$ 57,941
Current period provision	17,860	(11,883)	83,975
Charge-offs	(20,931)	(34,137)	(34,718)
Recoveries	18,866	13,834	7,592
Initial ACL on loans purchased with credit deterioration			8,845
Ending balance	118,036	102,241	134,427
Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			10,792
Initial ACL on loans purchased with credit deterioration			517
Personal Banking:
Changes in allowance for losses on allocated loans receivable
Beginning balance	31,040	30,954	18,356
Current period provision	23,545	10,456	8,896
Charge-offs	(11,908)	(17,101)	(14,183)
Recoveries	6,210	6,731	4,537
Initial ACL on loans purchased with credit deterioration			1,703
Ending balance	48,887	31,040	30,954
Personal Banking: | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			11,645
Personal Banking: | Residential mortgage loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	7,373	7,266	2,574
Current period provision	13,129	2,844	(3,289)
Charge-offs	(2,033)	(3,672)	(917)
Recoveries	792	935	362
Initial ACL on loans purchased with credit deterioration			1,095
Ending balance	19,261	7,373	7,266
Personal Banking: | Residential mortgage loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			7,441
Personal Banking: | Home equity loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	5,300	5,992	3,189
Current period provision	540	1,788	(3,357)
Charge-offs	(1,469)	(3,380)	(608)
Recoveries	1,531	900	766
Initial ACL on loans purchased with credit deterioration			216
Ending balance	5,902	5,300	5,992
Personal Banking: | Home equity loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			5,786
Personal Banking: | Vehicle loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	15,483	14,825	7,292
Current period provision	8,863	2,754	11,416
Charge-offs	(3,621)	(4,632)	(6,827)
Recoveries	2,334	2,536	1,867
Initial ACL on loans purchased with credit deterioration			235
Ending balance	23,059	15,483	14,825
Personal Banking: | Vehicle loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			842
Personal Banking: | Consumer loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	2,884	2,871	5,301
Current period provision	1,013	3,070	4,126
Charge-offs	(4,785)	(5,417)	(5,831)
Recoveries	1,553	2,360	1,542
Initial ACL on loans purchased with credit deterioration			157
Ending balance	665	2,884	2,871
Personal Banking: | Consumer loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			(2,424)
Commercial Banking:
Changes in allowance for losses on allocated loans receivable
Beginning balance	71,201	103,473	39,585
Current period provision	(5,685)	(22,339)	75,079
Charge-offs	(9,023)	(17,036)	(20,535)
Recoveries	12,656	7,103	3,055
Initial ACL on loans purchased with credit deterioration			7,142
Ending balance	69,149	71,201	103,473
Commercial Banking: | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			(853)
Commercial Banking: | Commercial real estate loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	54,141	79,381	15,843
Current period provision	(12,633)	(15,496)	58,483
Charge-offs	(7,366)	(11,933)	(4,240)
Recoveries	10,364	2,189	1,287
Initial ACL on loans purchased with credit deterioration			5,720
Ending balance	44,506	54,141	79,381
Commercial Banking: | Commercial real estate loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			2,288
Commercial Banking: | Commercial real estate loans - owner occupied
Changes in allowance for losses on allocated loans receivable
Beginning balance	3,883	10,518	5,745
Current period provision	36	(5,852)	2,588
Charge-offs	0	(890)	(83)
Recoveries	85	107	27
Initial ACL on loans purchased with credit deterioration			963
Ending balance	4,004	3,883	10,518
Commercial Banking: | Commercial real estate loans - owner occupied | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			1,278
Commercial Banking: | Commercial loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	13,177	13,574	17,997
Current period provision	6,912	(991)	14,008
Charge-offs	(1,657)	(4,213)	(16,212)
Recoveries	2,207	4,807	1,741
Initial ACL on loans purchased with credit deterioration			459
Ending balance	20,639	13,177	13,574
Commercial Banking: | Commercial loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			(4,419)
Off-Balance Sheet Exposure
Changes in allowance for losses on allocated loans receivable
Beginning balance	2,458	6,363	974
Current period provision	8,577	(3,905)	3,139
Charge-offs	0	0	0
Recoveries	0	0	0
Initial ACL on loans purchased with credit deterioration			0
Ending balance	11,035	2,458	6,363
Off-Balance Sheet Exposure | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			2,250
Off-Balance Sheet Exposure | Personal Banking:
Changes in allowance for losses on allocated loans receivable
Beginning balance	41	37	725
Current period provision	37	4	7
Charge-offs	0	0	0
Recoveries	0	0	0
Initial ACL on loans purchased with credit deterioration			0
Ending balance	78	41	37
Off-Balance Sheet Exposure | Personal Banking: | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			(695)
Off-Balance Sheet Exposure | Personal Banking: | Residential mortgage loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	2	2	0
Current period provision	2	0	2
Charge-offs	0	0	0
Recoveries	0	0	0
Initial ACL on loans purchased with credit deterioration			0
Ending balance	4	2	2
Off-Balance Sheet Exposure | Personal Banking: | Residential mortgage loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			0
Off-Balance Sheet Exposure | Personal Banking: | Home equity loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	39	35	323
Current period provision	35	4	5
Charge-offs	0	0	0
Recoveries	0	0	0
Initial ACL on loans purchased with credit deterioration			0
Ending balance	74	39	35
Off-Balance Sheet Exposure | Personal Banking: | Home equity loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			(293)
Off-Balance Sheet Exposure | Personal Banking: | Commercial loans
Changes in allowance for losses on allocated loans receivable
Beginning balance		0	402
Current period provision			0
Charge-offs			0
Recoveries			0
Initial ACL on loans purchased with credit deterioration			0
Ending balance			0
Off-Balance Sheet Exposure | Personal Banking: | Commercial loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			(402)
Off-Balance Sheet Exposure | Commercial Banking:
Changes in allowance for losses on allocated loans receivable
Beginning balance	2,417	6,326	249
Current period provision	8,540	(3,909)	3,132
Charge-offs	0	0	0
Recoveries	0	0	0
Initial ACL on loans purchased with credit deterioration			0
Ending balance	10,957	2,417	6,326
Off-Balance Sheet Exposure | Commercial Banking: | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			2,945
Off-Balance Sheet Exposure | Commercial Banking: | Commercial real estate loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	881	3,449	77
Current period provision	4,501	(2,568)	1,438
Charge-offs	0	0	0
Recoveries	0	0	0
Initial ACL on loans purchased with credit deterioration			0
Ending balance	5,382	881	3,449
Off-Balance Sheet Exposure | Commercial Banking: | Commercial real estate loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			1,934
Off-Balance Sheet Exposure | Commercial Banking: | Commercial real estate loans - owner occupied
Changes in allowance for losses on allocated loans receivable
Beginning balance	142	326	3
Current period provision	145	(184)	235
Charge-offs	0	0	0
Recoveries	0	0	0
Initial ACL on loans purchased with credit deterioration			0
Ending balance	287	142	326
Off-Balance Sheet Exposure | Commercial Banking: | Commercial real estate loans - owner occupied | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			88
Off-Balance Sheet Exposure | Commercial Banking: | Commercial loans
Changes in allowance for losses on allocated loans receivable
Beginning balance	1,394	2,551	169
Current period provision	3,894	(1,157)	1,459
Charge-offs	0	0	0
Recoveries	0	0	0
Initial ACL on loans purchased with credit deterioration			0
Ending balance	$ 5,288	$ 1,394	2,551
Off-Balance Sheet Exposure | Commercial Banking: | Commercial loans | Cumulative Effect, Period of Adoption, Adjustment
Changes in allowance for losses on allocated loans receivable
Beginning balance			$ 923