Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

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,
	2017			2016			2015
Current:
Federal	$	33,623		$	38,103		$	31,295
State	7,717			6,685			5,837
Foreign	2,725			2,672			2,048
	44,065			47,460			39,180
Deferred:
Federal and State	(4,726		)	13,169			11,520
Foreign	(120		)	(426		)	(209		)
	(4,846		)	12,743			11,311
	$	39,219		$	60,203		$	50,491

Income (Loss) before Income Tax Provision

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

	Year Ended December 31,
	2017		2016		2015
United States	$	184,168	$	148,402	$	116,011
Foreign	12,925		8,997		5,902
	$	197,093	$	157,399	$	121,913

Schedule of Deferred Tax Assets and Liabilities

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

	December 31,
	2017			2016
Intangibles	$	(73,921	)	$	(88,832	)
Depreciation expense	(9,851		)	(14,383		)
Allowance for doubtful accounts	2,615			3,185
Employee-related accruals	2,616			10,156
Stock-based compensation	4,766			9,300
Other	4,339			6,239
Net operating loss carryforwards	1,255			1,262
Valuation allowance	(1,255		)	(1,209		)
	$	(69,436	)	$	(74,282	)

Schedule of Effective Income Tax Rate Reconciliation

The reconciliation between the amount computed by applying the U.S. federal statutory tax rate of 35.0 percent to income before income taxes and the income tax provision is as follows (in thousands):

	Year Ended December 31,
	2017			2016			2015
Income tax provision at the statutory rate	$	68,983		$	55,089		$	42,669
State income taxes, net of federal benefit	6,751			4,873			4,559
Disallowed meals and entertainment expenses	1,854			1,814			1,718
Excess stock-based compensation benefit	(4,241		)	(165		)	(168		)
Impact of TCJA	(31,420		)	—			—
Other	(2,708		)	(1,408		)	1,713
	$	39,219		$	60,203		$	50,491

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,
	2017			2016		2015
Unrecognized tax benefit beginning of year	$	1,293		$	814	$	848
Gross increases - tax positions in current year	71			—		—
Gross increases - tax positions in prior year	—			479		—
Gross decreases - tax positions in prior year	(254		)	—		(34		)
Lapse of the statute of limitations	(680		)	—		—
Unrecognized tax benefit end of year	$	430		$	1,293	$	814