Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH WITHIN THE CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION:
Cash and cash equivalents	$ 974,696	$ 1,389,876
Deposits with banks and short-term investments	1,014,145	1,134,463
Restricted cash	615,090	44,488
TOTAL CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	$ 2,603,931	$ 2,568,827	$ 1,915,612	$ 2,455,559