Income Taxes (Tables)

9 Months Ended

Sep. 30, 2017

Income Tax Disclosure [Abstract]

Reconciliation of effective tax rates

The provision for income taxes differs from the amount computed by applying the U.S. corporate statutory income tax rate to income (loss) before income taxes for the reasons set forth below.

	Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
	(In thousands)
Income taxes at the statutory rate	$	2,455		$	(5,964	)	$	(8,985	)	$	(9,181	)
State taxes, net of federal benefit	25			(1,114		)	117			(521		)
Foreign tax rate differential	(3,403		)	2,436			2,263			6,018
Permanent differences	1,464			2,934			3,190			265
Uncertain tax positions	1,821			(292		)	666			(928		)
Valuation allowance	13			(176		)	330			87,404
Return to provision adjustments	(512		)	(33		)	(509		)	(33		)
Other	302			11			21			—
Income tax benefit (expense)	$	2,165		$	(2,198	)	$	(2,907	)	$	83,024

	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Income taxes at the statutory rate	(35.0	)%	(35.0	)%	(35.0	)%	(35.0	)%
State taxes, net of federal benefit	(0.4	)	(6.5	)	0.5		(2.0	)
Foreign tax rate differential	48.5		14.3		8.8		22.9
Permanent differences	(20.9	)	17.2		12.4		1.0
Uncertain tax positions	(26.0	)	(1.7	)	2.6		(3.5	)
Valuation allowance	(0.2	)	(1.0	)	1.3		333.2
Return to provision adjustments	7.3		(0.2	)	(2.0	)	(0.1	)
Other	(4.2	)	—		0.1		—
Effective tax rate	(30.9	)%	(12.9	)%	(11.3	)%	316.5	%