Consolidated VIEs - Summary of Consolidated VIE Assets and Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
ASSETS
Cash and cash equivalents	$ 1,000,102	$ 1,465,022
Customers and other receivables	169,268	136,345
Investments	638,960	1,007,339
Other assets	460,859	373,081
Total Assets	6,207,925	7,147,181
Liabilities:
Deposits and other customer payables	1,499,812	1,442,701
Other liabilities	530,137	626,203
Total Liabilities	4,952,106	5,494,217
Consolidated VIEs [Member]
ASSETS
Cash and cash equivalents	3,879	3,936
Customers and other receivables	273	305
Investments	180,951	204,062
Other assets	595	328
Total Assets	185,698	208,631
Liabilities:
Deposits and other customer payables	719	50
Other liabilities	517	910
Total Liabilities	$ 1,236	$ 960