Loans Receivable, Net - Collateral-Dependent Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Collateral Dependent Loans
Loans receivable	$ 16,135,046	$ 15,246,812
Collateral Pledged
Collateral Dependent Loans
Loans receivable	57,485	42,513
Business assets
Collateral Dependent Loans
Loans receivable	2,994	3,172
Residential real estate
Collateral Dependent Loans
Loans receivable	7,234	5,061
Other real estate
Collateral Dependent Loans
Loans receivable	46,579	33,125
Other
Collateral Dependent Loans
Loans receivable	678	1,155
Residential real estate
Collateral Dependent Loans
Loans receivable	1,653,777	1,446,008
Residential real estate | Collateral Pledged
Collateral Dependent Loans
Loans receivable	2,644	2,456
Residential real estate | Business assets
Collateral Dependent Loans
Loans receivable	0	0
Residential real estate | Residential real estate
Collateral Dependent Loans
Loans receivable	2,605	2,407
Residential real estate | Other real estate
Collateral Dependent Loans
Loans receivable	39	49
Residential real estate | Other
Collateral Dependent Loans
Loans receivable	0	0
Commercial real estate
Collateral Dependent Loans
Loans receivable	10,292,446	9,797,047
Commercial real estate | Collateral Pledged
Collateral Dependent Loans
Loans receivable	48,146	33,355
Commercial real estate | Business assets
Collateral Dependent Loans
Loans receivable	10	32
Commercial real estate | Residential real estate
Collateral Dependent Loans
Loans receivable	2,617	990
Commercial real estate | Other real estate
Collateral Dependent Loans
Loans receivable	45,519	32,333
Commercial real estate | Other
Collateral Dependent Loans
Loans receivable	0	0
Other commercial
Collateral Dependent Loans
Loans receivable	2,916,785	2,799,668
Other commercial | Collateral Pledged
Collateral Dependent Loans
Loans receivable	3,780	4,288
Other commercial | Business assets
Collateral Dependent Loans
Loans receivable	2,984	3,140
Other commercial | Residential real estate
Collateral Dependent Loans
Loans receivable	147	318
Other commercial | Other real estate
Collateral Dependent Loans
Loans receivable	630	300
Other commercial | Other
Collateral Dependent Loans
Loans receivable	19	530
Home equity
Collateral Dependent Loans
Loans receivable	869,963	822,232
Home equity | Collateral Pledged
Collateral Dependent Loans
Loans receivable	1,581	1,276
Home equity | Business assets
Collateral Dependent Loans
Loans receivable	0	0
Home equity | Residential real estate
Collateral Dependent Loans
Loans receivable	1,550	1,201
Home equity | Other real estate
Collateral Dependent Loans
Loans receivable	31	75
Home equity | Other
Collateral Dependent Loans
Loans receivable	0	0
Other consumer
Collateral Dependent Loans
Loans receivable	402,075	381,857
Other consumer | Collateral Pledged
Collateral Dependent Loans
Loans receivable	1,334	1,138
Other consumer | Business assets
Collateral Dependent Loans
Loans receivable	0	0
Other consumer | Residential real estate
Collateral Dependent Loans
Loans receivable	315	145
Other consumer | Other real estate
Collateral Dependent Loans
Loans receivable	360	368
Other consumer | Other
Collateral Dependent Loans
Loans receivable	$ 659	$ 625