Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Summary of Components of Deferred Tax Assets and Liabilities

The table below summarizes significant components of deferred tax assets and liabilities.

	Year Ended December 31,
	2019			2018
Deferred tax assets
Allowance for doubtful accounts	$	13,041		$	11,792
Accrued vacation and bonus	27,438			23,545
Deferred rent	—			9,016
Share-based compensation	12,647			11,837
Notes receivable from employees	12,187			12,993
State net operating loss carryforward	2,066			3,510
Foreign net operating loss carryforward	9,388			9,857
Federal tax credit and capital loss carryforward	7,336			9,470
Deferred compensation	2,117			1,801
Operating lease assets	43,397			—
Employee benefits obligations	1,191			943
Other, net	1,898			186
Total deferred tax assets	132,706			94,950
Deferred tax liabilities
Revenue recognition	(6,732		)	(5,087		)
Operating lease liabilities	(29,671		)	—
Property and equipment, net	(3,797		)	(6,652		)
Equity debt discount	(8,890		)	(11,014		)
Goodwill and other intangible assets	(209,250		)	(199,964		)
Total deferred tax liabilities	(258,340		)	(222,717		)
Foreign withholding tax	(1,195		)	(413		)
Valuation allowance	(19,865		)	(21,929		)
Net deferred tax liabilities	$	(146,694	)	$	(150,109	)

Summary of Components of Income Before Income Tax Provision from Continuing Operations

The table below summarizes the components of income before income tax provision (benefit) from continuing operations.

	Year Ended December 31,
	2019		2018		2017
Domestic	$	150,860	$	96,543	$	30,013
Foreign	137,590		111,249		57,092
Total	$	288,450	$	207,792	$	87,105

Summary of Components of Income Tax Provision from Continuing Operations

The table below summarizes the components of income tax provision (benefit) from continuing operations.

	Year Ended December 31,
	2019			2018		2017
Current
Federal	$	30,651		$	10,847	$	15,164
State	7,702			4,447		742
Foreign	37,083			21,056		14,816
	75,436			36,350		30,722
Deferred
Federal	(1,767		)	14,538		(47,820		)
State	785			503		(152		)
Foreign	(2,730		)	5,790		(3,607		)
	(3,712		)	20,831		(51,579		)
Income tax provision (benefit)	$	71,724		$	57,181	$	(20,857	)

Summary of Income Tax Provision from Continuing Operations Resulted in Effective Tax Rates

Our income tax provision (benefit) from continuing operations resulted in effective tax rates that varied from the statutory federal income tax rate as summarized below.

	Year Ended December 31,
	2019			2018			2017
Income tax expense at federal statutory rate	$	60,575		$	43,636		$	30,487
State income taxes, net of federal benefit	8,430			4,950			781
Detriment (benefit) from foreign tax rates	3,425			3,655			(8,500		)
Valuation allowance on foreign net operating loss carryforward	260			(450		)	253
Other expenses not deductible for tax purposes	4,362			3,543			2,466
Adjustment to reserve for uncertain tax positions	2,504			(132		)	456
Impact of 2017 U.S. tax reform — deferred tax	—			(706		)	(63,525		)
Impact of 2017 U.S. tax reform — Transition Tax	(1,088		)	50			18,655
Sale of Ringtail business	(2,097		)	3,798			—
Equity-based compensation	(4,447		)	(1,371		)	809
Other adjustments, net	(200		)	208			(2,739		)
Income tax provision (benefit)	$	71,724		$	57,181		$	(20,857	)