Consolidated VIEs - Summary of Consolidated VIE Assets and Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
ASSETS
Cash and cash equivalents	$ 596,601	$ 1,234,773
Customers and other receivables	188,296	160,897
Investments	741,868	698,977
Other assets	534,917	394,758
Total Assets	4,567,517	5,852,561
Liabilities:
Deposits and other customer payables	697,088	921,834
Other liabilities	508,206	539,770
Total Liabilities	3,969,636	4,593,691
Consolidated VIEs [Member]
ASSETS
Cash and cash equivalents	3,907	3,644
Customers and other receivables	591	240
Investments	216,862	186,300
Other assets	385	622
Total Assets	221,745	190,806
Liabilities:
Deposits and other customer payables	104	528
Other liabilities	497	448
Total Liabilities	$ 601	$ 976