Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Schedule of components of income tax provision (benefit)

Components of income tax provision (benefit) reflected in the consolidated statements of operations consist of the following (in thousands):

	Year Ended December 31,
	2018			2017			2016
Current	$	4,830		$	4,161		$	(27,319	)
Deferred	(2,430		)	(54,585		)	14,849
	$	2,400		$	(50,424	)	$	(12,470	)

Domestic	$	(3,161	)	$	(53,044	)	$	(9,631	)
Foreign	5,561			2,620			(2,839		)
	$	2,400		$	(50,424	)	$	(12,470	)

Schedule of components of income (loss) before income taxes

Components of income (loss) before income taxes are as follows (in thousands):

	Year Ended December 31,
	2018			2017			2016
Domestic	$	(28,838	)	$	(221	)	$	(61,484	)
Foreign	59,836			(20,151		)	(32,431		)
	$	30,998		$	(20,372	)	$	(93,915	)

Schedule of differences between U.S. statutory rate and effective rate

The primary differences between the U.S. statutory rate and our effective rate are as follows: 

	Year Ended December 31,
	2018		2017		2016
Statutory rate	21.0	%	35.0	%	35.0	%
Foreign provision	(15.9	)	(6.2	)	(5.1	)
Change in U.S. statutory rate (1)	—		293.1		—
Mandatory U.S. repatriation (1)	—		(39.7	)	—
Change in tax position (2)	—		(31.1	)	—
Goodwill impairment	—		—		(16.8	)
Other	2.6		(3.6	)	0.2
Effective rate	7.7	%	247.5	%	13.3	%

(1) As a result of the U.S. tax law changes, we recorded a net deferred tax benefit of $51.6 million during the fourth quarter of 2017 (see above).

(2) As a result of a change in tax position related to our foreign taxes, we recorded a tax charge of $6.3 million in June 2017.

Schedule of deferred income taxes

Deferred income taxes result from the effect of transactions that are recognized in different periods for financial and tax reporting purposes. The nature of these differences and the income tax effect of each are as follows (in thousands):

	December 31,
	2018			2017
Deferred tax liabilities:
Depreciation	$	149,974		$	135,824
Debt discount on 2022 Notes, 2023 Notes and 2032 Notes	5,902			7,727
Prepaid and other	1,309			437
Total deferred tax liabilities	$	157,185		$	143,988
Deferred tax assets:
Net operating losses	$	(47,916	)	$	(33,480	)
Reserves, accrued liabilities and other	(21,347		)	(19,496		)
Total deferred tax assets	(69,263		)	(52,976		)
Valuation allowance	17,940			12,337
Net deferred tax liabilities	$	105,862		$	103,349

Reconciliation of beginning and ending amount of unrecognized tax benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits for the years ended December 31, 2018 and 2017 is as follows (in thousands):

	2018			2017			2016
Balance at January 1,	$	318		$	343		$	—
Additions for tax positions of prior years	—			—			343
Reductions for tax positions of prior years	(12		)	(25		)	—
Balance at December 31,	$	306		$	318		$	343