Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign

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

	Year Ended December 31,
	2018		2017		2016
	(in thousands)
U.S.	$	251,056	$	217,725	$	116,852
Outside the U.S.	22,202		31,492		31,288
Income before income taxes	$	273,258	$	249,217	$	148,140

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,
	2018			2017			2016
	(in thousands)
Current tax expense
Federal	$	48,941		$	63,279		$	62,216
State	8,966			5,183			8,163
Foreign	1,471			2,000			745
Deferred tax (benefit) expense
Federal	(1,459		)	55,007			(25,309		)
State	(959		)	1,676			(4,250		)
Foreign	(57		)	(255		)	(137		)
Income taxes	$	56,903		$	126,890		$	41,428

Schedule of Deferred Tax Assets and Liabilities

Net deferred tax assets consisted of:

	December 31,
	2018			2017
	(in thousands)
Property, equipment and intangible assets	$	(17,212	)	$	(8,026	)
Accrued compensation	12,790			12,472
Accrued expenses	30,720			20,724
State Tax Credits	2,438			1,595
Foreign net operating losses	2,119			2,286
Valuation allowance on foreign net operating losses	(1,653		)	(1,392		)
Other	1,411			(474		)
Net deferred tax assets	$	30,613		$	27,185

Schedule of Income Tax Balance Sheet Presentation

Balance sheet presentation:

	December 31,
	2018		2017
	(in thousands)
Non-current net deferred tax assets	$	30,613	$	27,224
Non-current net deferred tax assets (liabilities)	—		(39		)
Net deferred tax assets	$	30,613	$	27,185

Schedule of Effective Income Tax Rate Reconciliation

The statutory U.S. federal income tax rate reconciles to the effective income tax rates as follows:

	Year Ended December 31,
	2018		2017		2016
Statutory U.S. federal income tax rate	21.0	%	35.0	%	35.0	%
State income taxes, net of federal tax benefit	2.9	%	1.8	%	1.5	%
Benefits and taxes related to foreign operations	(0.5	)%	(3.9	)%	(6.9	)%
Excess tax benefit on share-based compensation	(1.8	)%	(1.5	)%	(2.3	)%
Unrecognized tax positions	(0.4	)%	(0.2	)%	0.3	%
Transition Tax imposed on unrepatriated foreign earnings	(0.1	)%	14.1	%	—	%
Write-down of net deferred tax assets due to U.S. rate change	0.4	%	5.3	%	—	%
Other	(0.7	)%	0.3	%	0.4	%
Effective income tax rates	20.8	%	50.9	%	28.0	%

Reconciliation of Unrecognized Tax Benefits

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

	2018			2017			2016
	(in thousands)
Balance, January 1	$	2,284		$	2,691		$	3,137
Changes for tax positions of prior years	(861		)	(16		)	580
Increases for tax positions related to the current year	165			138			181
Settlements and lapsing of statutes of limitations	—			(529		)	(1,207		)
Balance, December 31	$	1,588		$	2,284		$	2,691