Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Schedule of Provision for Income Taxes

The components of the Company’s provision for income taxes for the years ended December 31, 2020, 2019 and 2018, and a reconciliation of the U.S. federal statutory income tax rate to the Company’s effective tax rates for such years, are shown below.

	Year Ended December 31,
	2020			2019		2018
Current:
Federal	$	6,531		$	3,756	$	2,507
Foreign		44,381			62,885		95,279
State and local		1,389			3,469		5,145
Total current		52,301			70,110		102,931
Deferred:
Federal		41,817			15,139		49,604
Foreign		6,946			2,091		(12,632	)
State and local		(1,615	)		7,642		8,414
Total deferred		47,148			24,872		45,386
Total	$	99,449		$	94,982	$	148,317

Schedule of Reconciliation of U.S. Federal Statutory Income Tax Rate to Effective Tax Rates

	Year Ended December 31,
	2020			2019			2018
U.S. federal statutory income tax rate		21.0	%		21.0	%		21.0	%
BEAT and GILTI tax		0.9			3.0			1.0
Foreign source income not subject to U.S.    income tax		(6.4	)		(5.3	)		(2.2	)
Change in U.S. federal valuation allowance		0.5			0.6			2.1
Share-based incentive compensation		0.6			(2.9	)		(5.0	)
Foreign taxes		3.2			5.8			5.4
Foreign tax credits		(2.1	)		(2.6	)		(4.3	)
State and local taxes		0.2			2.4			1.7
Loss (income) of non-controlling interests		0.1			(0.5	)		(0.1	)
Uncertain tax positions		0.7			1.8			0.2
Other		1.1			0.9			2.0
Effective income tax rate		19.8	%		24.2	%		21.8	%

Schedule of Deferred Tax Assets and Liabilities

Details of the Company’s deferred tax assets and liabilities are as follows:

	December 31,
	2020			2019
Deferred Tax Assets:
Basis adjustments (a)	$	195,313		$	233,371
Compensation and benefits		181,751			167,631
Net operating loss and tax credit carryforwards		281,901			272,456
Depreciation and amortization		1,065			1,815
Other		57,363			62,159
Gross deferred tax assets		717,393			737,432
Valuation allowance		(82,210	)		(76,486	)
Deferred tax assets (net of valuation allowance)		635,183			660,946
Deferred Tax Liabilities:
Depreciation and amortization		11,119			12,019
Compensation and benefits		17,564			7,058
Goodwill		35,717			29,876
Other		33,376			28,754
Deferred tax liabilities		97,776			77,707
Net deferred tax assets	$	537,407		$	583,239

(a) The basis adjustments recorded as of December 31, 2020 and 2019 are primarily the result of additional basis from acquisitions of interests, including the impact of the tax receivable agreement obligation.

Summary of Changes in Deferred Tax Assets Valuation Allowance

Changes in the deferred tax assets valuation allowance for the years ended December 31, 2020, 2019 and 2018 was as follows:

	Year Ended December 31,
	2020		2019			2018
Beginning Balance	$	76,486	$	73,114		$	61,456
Charged (credited) to provision for income taxes		4,598		3,515			14,156
Charged (credited) to other comprehensive income and    other		1,126		(143	)		(2,498	)
Ending Balance	$	82,210	$	76,486		$	73,114

Schedule of Gross Unrecognized Tax Benefits

A reconciliation of the beginning to the ending amount of gross unrecognized tax benefits (excluding interest and penalties) for the years ended December 31, 2020, 2019 and 2018 is as follows:

	Year Ended December 31,
	2020			2019			2018
Balance, January 1 (excluding interest and penalties    of $18,376, $15,901 and $15,136, respectively)	$	86,886		$	77,889		$	78,674
Increases in gross unrecognized tax benefits relating    to tax positions taken during:
Prior years		2,454			11,764			653
Current year		14,702			22,383			17,961
Decreases in gross unrecognized tax benefits    relating to:
Tax positions taken during prior years		(9,814	)		(19	)		(699	)
Settlements with tax authorities		(904	)		(7,251	)		(1,218	)
Lapse of the applicable statute of limitations		(12,370	)		(17,880	)		(17,482	)
Balance, December 31 (excluding interest and    penalties of $18,882, $18,376 and $15,901,    respectively)	$	80,954		$	86,886		$	77,889

Schedule of Additional Information Relating to Unrecognized Tax Benefits

Additional information with respect to unrecognized tax benefits is as follows:

	Year Ended December 31,
	2020		2019		2018
Unrecognized tax benefits at the end of the year that,    if recognized, would favorably affect the effective    tax rate (includes interest and penalties of $18,882,    $18,376 and $15,901, respectively)	$	86,117	$	85,603	$	78,693
Unrecognized tax benefits that, if recognized, would not    affect the effective tax rate	$	13,719	$	19,659	$	15,097
Interest and penalties recognized in current income    tax expense (after giving effect to the reversal of    interest and penalties of $3,757, $3,455 and    $4,889, respectively)	$	506	$	2,475	$	765