Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign

Total income from continuing operations before income taxes, classified by source of income, was as follows:

	Year Ended December 31,
	2016		2015		2014
	(in thousands)
U.S.	$	168,692	$	151,209	$	138,616
Outside the U.S.	31,288		32,776		35,142
Income from continuing operations before income taxes	$	199,980	$	183,985	$	173,758

Schedule of Components of Income Tax Expense (Benefit)

The provision for income taxes, classified by the timing and location of payment, was as follows:

	Year Ended December 31,
	2016			2015			2014
	(in thousands)
Current tax expense
Federal	$	62,216		$	50,794		$	67,985
State	8,163			5,476			6,278
Foreign	745			592			1,689
Deferred tax (benefit) expense
Federal	(7,723		)	(112		)	(21,398		)
State	(2,655		)	(737		)	(2,116		)
Foreign	(137		)	(57		)	(153		)
Income taxes	$	60,609		$	55,956		$	52,285

Schedule of Deferred Tax Assets and Liabilities

Net deferred tax assets consisted of:

	December 31,
	2016			2015
	(in thousands)
Property, equipment and intangible assets	$	(9,171	)	$	(8,899	)
Accrued compensation	17,365			16,274
Accrued expenses	43,176			35,415
Foreign operations	(941		)	(868		)
Valuation allowance on foreign deferred tax assets	(145		)	(153		)
Foreign net operating losses	2,064			1,897
Valuation allowance on foreign net operating losses	(1,270		)	(1,383		)
Deferred tax asset on unrecognized tax positions	1,107			1,200
Other	335			(1,555		)
Net deferred tax assets	$	52,520		$	41,928

Schedule of Income Tax Balance Sheet Presentation

Balance sheet presentation:

	December 31,
	2016			2015
	(in thousands)
Non-current net deferred tax assets	$	52,812		$	42,434
Non-current net deferred tax liabilities	(292		)	(506		)
Net deferred tax assets	$	52,520		$	41,928

Schedule of Effective Income Tax Rate Reconciliation

The statutory United States federal income tax rate reconciles to the effective income tax rates for continuing operations as follows:

	Year Ended December 31,
	2016		2015		2014
Statutory U.S. federal income tax rate	35.0	%	35.0	%	35.0	%
State income taxes, net of federal tax benefit	1.7	%	1.7	%	1.6	%
Benefits and taxes related to foreign operations	(5.2	)%	(6.2	)%	(6.2	)%
Windfall tax benefit on share-based compensation	(1.7	)%	—	%	—	%
Unrecognized tax positions	0.2	%	(0.2	)%	(0.4	)%
Other	0.3	%	0.1	%	0.1	%
Effective income tax rates	30.3	%	30.4	%	30.1	%

Reconciliation of Unrecognized Tax Benefits

The following table presents a reconciliation of the beginning and ending amounts of unrecognized tax benefits:

	2016			2015			2014
	(in thousands)
Balance, January 1	$	3,137		$	3,395		$	4,047
Changes for tax positions of prior years	580			116			5
Increases for tax positions related to the current year	181			772			1,201
Settlements and lapsing of statutes of limitations	(1,207		)	(1,146		)	(1,858		)
Balance, December 31	$	2,691		$	3,137		$	3,395