Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Schedule of Income Before (Benefit) Provision For Income Taxes

Income before (benefit) provision for income taxes consisted of the following:

(in thousands)	Year Ended December 31,
	2017			2016			2015
U.S.	$	83,525		$	67,199		$	66,889
Foreign		(73	)		(268	)		(512	)
	$	83,452		$	66,931		$	66,377

(Benefit) Provision for Income Taxes

The (benefit) provision for income taxes consisted of the following:

(in thousands)	Year Ended December 31,
	2017			2016		2015
Current:
U.S. Federal	$	21,171		$	17,203	$	7,976
State		2,976			2,049		1,851
Foreign		2,016			1,683		1,645
		26,163			20,935		11,472
Deferred:
U.S. Federal		(103,518	)		4,005		13,201
State		6,948			3,039		1,538
Foreign		(61	)		701		(304	)
		(96,631	)		7,745		14,435
Total	$	(70,468	)	$	28,680	$	25,907

Reconciliation of U.S. Federal Statutory Tax Rate to Company's Effective Tax Rate

The reconciliation of the U.S. federal statutory tax rate to the Company’s effective tax rate is as follows:

	Year Ended December 31,
	2017			2016			2015
U.S. federal statutory rate		35.0	%		35.0	%		35.0	%
State taxes, net of federal benefit		4.1			4.2			4.2
State deferred tax rate change, net of federal benefit		0.5			2.0			(0.4	)
Valuation allowance		0.1			1.1			—
Share-based compensation		(1.0	)		—			—
Enactment of the Tax Cuts and Jobs Act		(122.9	)		—			—
Other		(0.2	)		0.6			0.2
		(84.4	)%		42.9	%		39.0	%

Deferred Income Taxes Related to Temporary Differences between Tax Bases of Assets and Liabilities

The following table shows the deferred income taxes related to the temporary differences between the tax bases of assets and liabilities and the respective amounts included in “Deferred income taxes, net” on the Company’s Consolidated Balance Sheets:

(in thousands)	December 31,
	2017		2016
Deferred tax liabilities:
Accelerated depreciation	$	195,694	$	293,141
Prepaid costs currently deductible		4,152		6,572
Other		4,405		5,747
Total deferred tax liabilities		204,251		305,460
Deferred tax assets:
Accrued costs not yet deductible		7,880		9,785
Allowance for doubtful accounts		484		809
Deferred revenues		213		965
Share-based compensation		1,045		1,882
Total deferred tax assets, net of valuation allowance of $0.8 million in 2017 and $0.7 million in 2016		9,622		13,441
Deferred income taxes, net	$	194,629	$	292,019