Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
NET INCOME	$ 90,826	$ 58,331
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization of property	9,361	8,986
Noncash lease expense	17,210	15,489
Amortization of deferred expenses and share-based incentive compensation	100,271	101,097
Amortization of intangible assets related to acquisitions	15	446
Deferred tax provision	29,673	11,522
(Increase) decrease in operating assets and increase (decrease) in operating liabilities:
Receivables-net	(7,486)	59,961
Investments	(202,534)	23,325
Other assets	(16,134)	(172,121)
Accrued compensation and benefits and other liabilities	(144,542)	(263,012)
Net cash used in operating activities	(123,340)	(155,976)
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property	(7,498)	(12,011)
Disposals of property	628	69
Net cash used in investing activities	(6,870)	(11,942)
Proceeds from:
Contributions from noncontrolling interests		25
Payments for:
Customer deposits	(58,739)	(70,652)
Distributions to noncontrolling interests	(1,020)	(1,411)
Payments under tax receivable agreement	(10,215)	(25,557)
Purchase of Class A common stock	(122,652)	(95,227)
Class A common stock dividends	(49,441)	(48,759)
Settlement of share-based incentive compensation	(64,804)	(66,728)
Other financing activities	(14,302)	(1,869)
Net cash provided by (used in) financing activities	244,519	(310,178)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	(79,205)	(61,851)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	35,104	(539,947)
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH— January 1	2,568,827	2,455,559
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH— March 31	2,603,931	$ 1,915,612
LGAC [Member]
Proceeds from:
LGAC IPO	575,000
Payments for:
Payments of LGAC IPO underwriting fees and other offering costs	$ 9,308