Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Components of Long Term Deferred Tax Liabilities Net

The net long-term deferred tax liabilities in the accompanying consolidated balance sheets include the following components (in thousands):

	Year Ended December 31,
	2017			2016			2015
Deferred tax liabilities:
Fixed assets	$	323,548		$	490,221		$	472,817
Deferred charges and other liabilities	6,266			10,908			11,317
Total deferred tax liabilities	329,814			501,129			484,134
Deferred tax assets:
Net operating loss carryforwards	(122,682		)	(111,147		)	(52,374		)
Allowance for doubtful accounts	(1,362		)	(763		)	(1,036		)
Stock-based compensation expense	(1,823		)	(4,033		)	(4,830		)
Convertible senior notes	(8,265		)	—			—
Alternative minimum tax credit carryforward	(10,431		)	(20,863		)	(20,863		)
Foreign tax credit carryforward	(18,711		)	(17,554		)	(17,972		)
Other	(4,501		)	(6,044		)	(5,440		)
Total deferred tax assets	(167,775		)	(160,404		)	(102,515		)
Valuation allowance	35,426			2,295			—
Total deferred tax liabilities, net	$	197,465		$	343,020		$	381,619

Components of Income Tax Expenses

The components of the income tax expense follow (in thousands):

	Year Ended December 31,
	2017			2016			2015
Current tax expense (benefit):
U.S. and State	$	(9,743	)	$	709		$	—
Foreign	1,024			(257		)	5,671
Total current tax expense	(8,719		)	452			5,671
Deferred tax expense:
U.S. and State	(142,136		)	(45,958		)	34,086
Foreign	611			—			—
Total deferred tax expense	(141,525		)	(45,958		)	34,086
Total tax expense (benefit)	$	(150,244	)	$	(45,506	)	$	39,757

Income (Loss) Before Income Taxes Based on Jurisdiction Earned

Income from operations before income taxes, based on jurisdiction earned, was as follows (in thousands):

	Year Ended December 31,
	2017			2016			2015
U.S.	$	(105,692	)	$	(93,704	)	$	65,894
Foreign	(17,131		)	(15,648		)	40,684
Total income (loss) from operations before income taxes	$	(122,823	)	$	(109,352	)	$	106,578

Reconciliation of Difference Between Company's Income Tax Provision Calculated at Federal Statutory Rate and Actual Income Tax Provision

The following table reconciles the difference between the Company’s income tax provision calculated at the federal statutory rate of 35% and the actual income tax provision (in thousands):

	Year Ended December 31,
	2017			2016			2015
U.S. federal statutory rate	$	(42,988	)	$	(38,274	)	$	37,302
State taxes, net	(1,228		)	(1,094		)	1,066
Non-deductible expense	3,488			1,070			1,440
Change in valuation allowance	15,118			2,295			(1,011		)
Income excluded from U.S. taxable income	—			(9,478		)	—
Change in enacted U.S. tax rate	(125,225		)	—			—
Foreign taxes and other	591			(25		)	960
	$	(150,244	)	$	(45,506	)	$	39,757