Loans Receivable, Net - Credit Quality Indicators for Commercial Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Credit Quality Indicators By Origination
Total	$ 13,731,019	$ 13,432,031
Commercial real estate
Credit Quality Indicators By Origination
Term loans originated current fiscal year	724,549	2,679,564
Term loans originated fiscal year before current fiscal year	2,611,827	1,512,845
Term loans originated two years before current fiscal year	1,481,501	952,039
Term loans originated three years before current fiscal year	863,746	808,275
Term loans originated four years before current fiscal year	778,708	665,733
Term loans originated five years before current fiscal year	2,207,850	1,677,875
Revolving loans	197,404	334,500
Total	8,865,585	8,630,831
Commercial real estate | Pass
Credit Quality Indicators By Origination
Term loans originated current fiscal year	722,024	2,677,540
Term loans originated fiscal year before current fiscal year	2,610,130	1,499,895
Term loans originated two years before current fiscal year	1,467,853	919,091
Term loans originated three years before current fiscal year	825,419	788,292
Term loans originated four years before current fiscal year	760,413	624,018
Term loans originated five years before current fiscal year	2,113,551	1,621,819
Revolving loans	196,410	332,696
Total	8,695,800	8,463,351
Commercial real estate | Special Mention
Credit Quality Indicators By Origination
Term loans originated current fiscal year	0	0
Term loans originated fiscal year before current fiscal year	0	0
Term loans originated two years before current fiscal year	0	0
Term loans originated three years before current fiscal year	0	0
Term loans originated four years before current fiscal year	0	0
Term loans originated five years before current fiscal year	0	0
Revolving loans	0	0
Total	0	0
Commercial real estate | Substandard
Credit Quality Indicators By Origination
Term loans originated current fiscal year	2,525	2,024
Term loans originated fiscal year before current fiscal year	1,697	12,950
Term loans originated two years before current fiscal year	13,648	32,948
Term loans originated three years before current fiscal year	38,327	19,983
Term loans originated four years before current fiscal year	18,295	41,715
Term loans originated five years before current fiscal year	94,275	56,030
Revolving loans	993	1,803
Total	169,760	167,453
Commercial real estate | Doubtful/ Loss
Credit Quality Indicators By Origination
Term loans originated current fiscal year	0	0
Term loans originated fiscal year before current fiscal year	0	0
Term loans originated two years before current fiscal year	0	0
Term loans originated three years before current fiscal year	0	0
Term loans originated four years before current fiscal year	0	0
Term loans originated five years before current fiscal year	24	26
Revolving loans	1	1
Total	25	27
Other commercial
Credit Quality Indicators By Origination
Term loans originated current fiscal year	148,882	751,151
Term loans originated fiscal year before current fiscal year	697,130	429,500
Term loans originated two years before current fiscal year	372,931	235,591
Term loans originated three years before current fiscal year	220,962	188,009
Term loans originated four years before current fiscal year	172,157	209,287
Term loans originated five years before current fiscal year	496,187	312,852
Revolving loans	552,799	537,800
Total	2,661,048	2,664,190
Other commercial | Pass
Credit Quality Indicators By Origination
Term loans originated current fiscal year	148,562	746,709
Term loans originated fiscal year before current fiscal year	692,374	420,547
Term loans originated two years before current fiscal year	367,657	226,614
Term loans originated three years before current fiscal year	209,206	179,679
Term loans originated four years before current fiscal year	165,572	207,509
Term loans originated five years before current fiscal year	485,791	297,926
Revolving loans	526,330	507,258
Total	2,595,492	2,586,242
Other commercial | Special Mention
Credit Quality Indicators By Origination
Term loans originated current fiscal year	0	0
Term loans originated fiscal year before current fiscal year	0	0
Term loans originated two years before current fiscal year	0	0
Term loans originated three years before current fiscal year	0	0
Term loans originated four years before current fiscal year	0	0
Term loans originated five years before current fiscal year	0	0
Revolving loans	0	0
Total	0	0
Other commercial | Substandard
Credit Quality Indicators By Origination
Term loans originated current fiscal year	320	4,442
Term loans originated fiscal year before current fiscal year	4,756	8,952
Term loans originated two years before current fiscal year	5,272	8,974
Term loans originated three years before current fiscal year	11,743	8,329
Term loans originated four years before current fiscal year	6,583	1,775
Term loans originated five years before current fiscal year	9,890	14,275
Revolving loans	26,449	30,526
Total	65,013	77,273
Other commercial | Doubtful/ Loss
Credit Quality Indicators By Origination
Term loans originated current fiscal year	0	0
Term loans originated fiscal year before current fiscal year	0	1
Term loans originated two years before current fiscal year	2	3
Term loans originated three years before current fiscal year	13	1
Term loans originated four years before current fiscal year	2	3
Term loans originated five years before current fiscal year	506	651
Revolving loans	20	16
Total	$ 543	$ 675