Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Schedule of Components of Income Taxes

The provision for income taxes consists of the following (in thousands):

	Year Ended December 31,
	2018			2017			2016
Current:
Federal	$	20,550		$	33,623		$	38,103
State	10,617			7,717			6,685
Foreign	3,896			2,725			2,672
	35,063			44,065			47,460
Deferred:
Federal and State	11,471			(4,726		)	13,169
Foreign	(343		)	(120		)	(426		)
	11,128			(4,846		)	12,743
	$	46,191		$	39,219		$	60,203

Income (Loss) before Income Tax Provision

Income from continuing operations before income taxes consists of the following (in thousands):

	Year Ended December 31,
	2018		2017		2016
United States	$	190,688	$	184,168	$	148,402
Foreign	13,487		12,925		8,997
	$	204,175	$	197,093	$	157,399

Schedule of Deferred Tax Assets and Liabilities

The components of deferred tax assets (liabilities) are as follows (in thousands):

	December 31,
	2018			2017
Intangibles	$	(90,834	)	$	(73,921	)
Depreciation expense	(14,983		)	(9,851		)
Allowance for doubtful accounts	1,600			2,615
Employee-related accruals	9,608			2,616
Stock-based compensation	9,506			4,766
Other	5,270			4,339
Net operating loss carryforwards–foreign	999			1,255
Valuation allowance	(999		)	(1,255		)
	$	(79,833	)	$	(69,436	)

Schedule of Effective Income Tax Rate Reconciliation

The reconciliation between the amount computed by applying the U.S. federal statutory tax rate of 21 percent in 2018 and 35 percent in 2017 and 2016 to income before income taxes, for each respective year, and the income tax provision is as follows (in thousands):

	Year Ended December 31,
	2018			2017			2016
Income tax provision at the statutory rate	$	42,877		$	68,983		$	55,089
State income taxes, net of federal benefit	9,432			6,751			4,873
Disallowed meals and entertainment expenses	1,591			1,854			1,814
Excess stock-based compensation benefit	(2,193		)	(4,241		)	(165		)
Work opportunity tax credit	(3,081		)	(1,950		)	(1,463		)
Impact of TCJA	(2,992		)	(31,420		)	—
Other	557			(758		)	55
	$	46,191		$	39,219		$	60,203

Schedule of Unrecognized Tax Benefits Roll Forward

The following is a reconciliation of the total amounts of unrecognized tax benefits (in thousands):

	Year Ended December 31,
	2018			2017			2016
Unrecognized tax benefit beginning of year	$	430		$	1,293		$	814
Gross increases - tax positions in current year	20			71			—
Gross increases - tax positions in prior year	69			—			479
Gross decreases - tax positions in prior year	—			(254		)	—
Lapse of the statute of limitations	(130		)	(680		)	—
Unrecognized tax benefit end of year	$	389		$	430		$	1,293