Loans Receivable, Net - Loans Receivable Based On Our Internal Risk Ratings, Separated By Year Of Origination (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 24,831,546		$ 22,003,017
CECL reserve	(133,024)	$ (122,221)	(124,679)	$ (128,945)	$ (172,100)	$ (173,549)
Loans receivable, net	24,698,522		21,878,338
Held-to-maturity debt securities	0		78,013
U.S. Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	2,170,923		8,514,292
Year Two	8,364,051		786,287
Year Three	761,335		1,623,239
Year Four	1,390,296		2,858,738
Year Five	3,030,794		958,787
Prior	714,748		399,977
Loans receivable	16,432,147		15,141,320
Non-U.S. Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	1,134,897		2,101,240
Year Two	2,114,414		98,412
Year Three	92,847		2,582,847
Year Four	2,345,378		394,949
Year Five	146,416		0
Prior	0		0
Loans receivable	5,833,952		5,177,448
Unique Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	1,130,039		0
Year Two	0		0
Year Three	0		322,787
Year Four	290,945		1,017,799
Year Five	859,654		0
Prior	0		58,854
Loans receivable	2,280,638		1,399,440
CECL reserve	(33,495)	(30,897)	(32,657)	(32,782)	(33,305)	(33,159)
Impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0		0
Year Two	0		0
Year Three	0		0
Year Four	0		284,809
Year Five	284,809		0
Prior	0		0
Loans receivable	284,809		284,809
CECL reserve	(54,874)	$ (54,874)	(54,874)	$ (69,661)	$ (69,661)	$ (69,661)
Total loans receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	4,435,859		10,615,532
Year Two	10,478,465		884,699
Year Three	854,182		4,528,873
Year Four	4,026,619		4,556,295
Year Five	4,321,673		958,787
Prior	714,748		458,831
Loans receivable	24,831,546		22,003,017
1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	836,222		642,776
1 | U.S. Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	114,778		125,873
Year Two	469,851		0
Year Three	6,700		196,017
Year Four	199,931		72,752
Year Five	0		248,134
Prior	44,962		0
Loans receivable	836,222		642,776
1 | Non-U.S. Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0		0
Year Two	0		0
Year Three	0		0
Year Four	0		0
Year Five	0		0
Prior	0		0
Loans receivable	0		0
1 | Unique Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0		0
Year Two	0		0
Year Three	0		0
Year Four	0		0
Year Five	0		0
Prior	0		0
Loans receivable	0		0
1 | Impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0		0
Year Two	0		0
Year Three	0		0
Year Four	0		0
Year Five	0		0
Prior	0		0
Loans receivable	0		0
1 | Total loans receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	114,778		125,873
Year Two	469,851		0
Year Three	6,700		196,017
Year Four	199,931		72,752
Year Five	0		248,134
Prior	44,962		0
Loans receivable	836,222		642,776
2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	5,856,051		5,200,533
2 | U.S. Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0		876,536
Year Two	1,782,773		427,839
Year Three	488,540		221,513
Year Four	152,672		1,134,176
Year Five	1,384,866		354,775
Prior	0		82,274
Loans receivable	3,808,851		3,097,113
2 | Non-U.S. Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	163,027		698,130
Year Two	619,169		98,412
Year Three	92,847		1,306,878
Year Four	1,172,157		0
Year Five	0		0
Prior	0		0
Loans receivable	2,047,200		2,103,420
2 | Unique Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0		0
Year Two	0		0
Year Three	0		0
Year Four	0		0
Year Five	0		0
Prior	0		0
Loans receivable	0		0
2 | Impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0		0
Year Two	0		0
Year Three	0		0
Year Four	0		0
Year Five	0		0
Prior	0		0
Loans receivable	0		0
2 | Total loans receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	163,027		1,574,666
Year Two	2,401,942		526,251
Year Three	581,387		1,528,391
Year Four	1,324,829		1,134,176
Year Five	1,384,866		354,775
Prior	0		82,274
Loans receivable	5,856,051		5,200,533
3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	15,773,096		13,604,027
3 | U.S. Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	2,056,145		7,511,883
Year Two	6,111,427		358,448
Year Three	266,095		1,109,170
Year Four	941,151		1,116,872
Year Five	1,110,221		292,520
Prior	519,455		228,264
Loans receivable	11,004,494		10,617,157
3 | Non-U.S. Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	971,870		1,403,110
Year Two	1,495,245		0
Year Three	0		932,939
Year Four	847,533		394,949
Year Five	146,416		0
Prior	0		0
Loans receivable	3,461,064		2,730,998
3 | Unique Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	1,130,039		0
Year Two	0		0
Year Three	0		0
Year Four	0		197,018
Year Five	177,499		0
Prior	0		58,854
Loans receivable	1,307,538		255,872
3 | Impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0		0
Year Two	0		0
Year Three	0		0
Year Four	0		0
Year Five	0		0
Prior	0		0
Loans receivable	0		0
3 | Total loans receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	4,158,054		8,914,993
Year Two	7,606,672		358,448
Year Three	266,095		2,042,109
Year Four	1,788,684		1,708,839
Year Five	1,434,136		292,520
Prior	519,455		287,118
Loans receivable	15,773,096		13,604,027
4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	2,081,368		2,270,872
4 | U.S. Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0		0
Year Two	0		0
Year Three	0		96,539
Year Four	96,542		534,938
Year Five	535,707		63,358
Prior	150,331		89,439
Loans receivable	782,580		784,274
4 | Non-U.S. Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0		0
Year Two	0		0
Year Three	0		343,030
Year Four	325,688		0
Year Five	0		0
Prior	0		0
Loans receivable	325,688		343,030
4 | Unique Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0		0
Year Two	0		0
Year Three	0		322,787
Year Four	290,945		820,781
Year Five	682,155		0
Prior	0		0
Loans receivable	973,100		1,143,568
4 | Impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0		0
Year Two	0		0
Year Three	0		0
Year Four	0		0
Year Five	0		0
Prior	0		0
Loans receivable	0		0
4 | Total loans receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0		0
Year Two	0		0
Year Three	0		762,356
Year Four	713,175		1,355,719
Year Five	1,217,862		63,358
Prior	150,331		89,439
Loans receivable	2,081,368		2,270,872
5 | U.S. Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0		0
Year Two	0		0
Year Three	0		0
Year Four	0		0
Year Five	0		0
Prior	0		0
Loans receivable	0		0
5 | Non-U.S. Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0		0
Year Two	0		0
Year Three	0		0
Year Four	0		0
Year Five	0		0
Prior	0		0
Loans receivable	0		0
5 | Unique Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0		0
Year Two	0		0
Year Three	0		0
Year Four	0		0
Year Five	0		0
Prior	0		0
Loans receivable	0		0
5 | Impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0		0
Year Two	0		0
Year Three	0		0
Year Four	0		284,809
Year Five	284,809		0
Prior	0		0
Loans receivable	284,809		284,809
5 | Total loans receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0		0
Year Two	0		0
Year Three	0		0
Year Four	0		284,809
Year Five	284,809		0
Prior	0		0
Loans receivable	$ 284,809		$ 284,809