Consolidated VIEs - Summary of Consolidated VIE Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Cash and cash equivalents	$ 1,234,773	$ 1,465,022	$ 1,389,876
Customers and other receivables	160,897	136,345
Investments	698,977	1,007,339
Other assets	394,758	373,081
Total Assets	5,852,561	7,147,181	$ 5,971,861
Liabilities:
Deposits and other customer payables	921,834	1,442,701
Other liabilities	539,770	626,203
Total Liabilities	4,593,691	5,494,217
Consolidated VIEs [Member]
ASSETS
Cash and cash equivalents	3,644	3,936
Customers and other receivables	240	305
Investments	186,300	204,062
Other assets	622	328
Total Assets	190,806	208,631
Liabilities:
Deposits and other customer payables	528	50
Other liabilities	448	910
Total Liabilities	$ 976	$ 960