Income Taxes - Income (Loss) Before Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Taxes [Line Items]
Total income before income taxes	$ (3,780)	$ 36,297	$ (18,343)	$ 70,746
Ireland
Income Taxes [Line Items]
Total income before income taxes	(10,962)	2,684	(15,889)	9,348
United States
Income Taxes [Line Items]
Total income before income taxes	7,019	34,651	(2,816)	66,661
France
Income Taxes [Line Items]
Total income before income taxes	$ 163	$ (1,038)	$ 362	$ (5,263)