Variable Interest Entities (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Assets
Loans receivable	$ 22,870,848		$ 23,787,012
Current expected credit loss reserve	(893,938)	$ (751,370)	(576,936)	$ (363,875)	$ (336,591)	$ (326,137)
Loans receivable, net	21,976,910		23,210,076
Other assets	225,795		476,088
Total Assets	22,636,599		24,036,178
Liabilities
Other liabilities	257,299		362,531
Total Liabilities	18,632,001		19,648,674
Securitized debt obligations, net
Liabilities
Total obligation	2,327,774		2,505,417
VIE
Assets
Loans receivable	2,972,867		3,061,278
Current expected credit loss reserve	(237,335)		(183,508)
Loans receivable, net	2,735,532		2,877,770
Other assets	12,048		103,692
Total Assets	2,747,580		2,981,462
Liabilities
Other liabilities	6,192		8,101
Total Liabilities	2,333,966		2,513,518
VIE | Securitized debt obligations, net
Liabilities
Total obligation	$ 2,327,774		$ 2,505,417