Loans Receivable, Net - Collateral-Dependent Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Collateral Dependent Loans
Total	$ 17,181,187	$ 16,198,082
Collateral Pledged
Collateral Dependent Loans
Total	55,858	43,044
Business assets
Collateral Dependent Loans
Total	11,901	3,236
Residential real estate
Collateral Dependent Loans
Total	13,725	17,578
Other real estate
Collateral Dependent Loans
Total	29,401	21,635
Other
Collateral Dependent Loans
Total	831	595
Residential real estate
Collateral Dependent Loans
Total	1,837,697	1,704,544
Residential real estate | Collateral Pledged
Collateral Dependent Loans
Total	3,319	11,134
Residential real estate | Business assets
Collateral Dependent Loans
Total	0	0
Residential real estate | Residential real estate
Collateral Dependent Loans
Total	3,316	11,099
Residential real estate | Other real estate
Collateral Dependent Loans
Total	3	35
Residential real estate | Other
Collateral Dependent Loans
Total	0	0
Commercial real estate
Collateral Dependent Loans
Total	10,833,841	10,303,306
Commercial real estate | Collateral Pledged
Collateral Dependent Loans
Total	35,483	24,921
Commercial real estate | Business assets
Collateral Dependent Loans
Total	0	6
Commercial real estate | Residential real estate
Collateral Dependent Loans
Total	7,676	4,317
Commercial real estate | Other real estate
Collateral Dependent Loans
Total	27,807	20,598
Commercial real estate | Other
Collateral Dependent Loans
Total	0	0
Other commercial
Collateral Dependent Loans
Total	3,177,051	2,901,863
Other commercial | Collateral Pledged
Collateral Dependent Loans
Total	13,853	3,963
Other commercial | Business assets
Collateral Dependent Loans
Total	11,901	3,230
Other commercial | Residential real estate
Collateral Dependent Loans
Total	516	98
Other commercial | Other real estate
Collateral Dependent Loans
Total	1,198	620
Other commercial | Other
Collateral Dependent Loans
Total	238	15
Home equity
Collateral Dependent Loans
Total	931,440	888,013
Home equity | Collateral Pledged
Collateral Dependent Loans
Total	1,995	1,993
Home equity | Business assets
Collateral Dependent Loans
Total	0	0
Home equity | Residential real estate
Collateral Dependent Loans
Total	1,976	1,968
Home equity | Other real estate
Collateral Dependent Loans
Total	19	25
Home equity | Other
Collateral Dependent Loans
Total	0	0
Other consumer
Collateral Dependent Loans
Total	401,158	400,356
Other consumer | Collateral Pledged
Collateral Dependent Loans
Total	1,208	1,033
Other consumer | Business assets
Collateral Dependent Loans
Total	0	0
Other consumer | Residential real estate
Collateral Dependent Loans
Total	241	96
Other consumer | Other real estate
Collateral Dependent Loans
Total	374	357
Other consumer | Other
Collateral Dependent Loans
Total	$ 593	$ 580