Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment		Ordinary Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
Beginning balance (in shares) at Dec. 31, 2017				48,290,000
Beginning balance at Dec. 31, 2017	$ 1,815,314	$ (22,516)		$ 74,750	$ 1,735,048	$ (133)	$ 45,313	$ (39,664)	$ (22,516)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issuance (in shares)				1,423,000
Share issuances	$ 0			$ 1,887		(1,887)
Share repurchases (in shares)	(500,333)			(500,000)
Share repurchases	$ (50,000)			$ (640)	(49,360)
Stock-based compensation plans (in shares)				110,000
Stock-based compensation plans	20,128			$ 147	19,423	558
Net loss	(189,399)							(189,399)
Other comprehensive income (loss)	(69,789)						(69,789)
Ending balance (in shares) at Dec. 31, 2018				49,323,000
Ending balance at Dec. 31, 2018	$ 1,503,738			$ 76,144	1,705,111	(1,462)	(24,476)	(251,579)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201617Member
Stock-based compensation plans (in shares)				88,000
Stock-based compensation plans	$ 30,071			$ 113	29,759	199
Net loss	(155,176)							(155,176)
Other comprehensive income (loss)	$ 5,084						5,084
Ending balance (in shares) at Dec. 31, 2019	49,411,016			49,411,000
Ending balance at Dec. 31, 2019	$ 1,383,717	$ (639)	[1]	$ 76,257	1,734,870	(1,263)	(19,392)	(406,755)	$ (639)	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation plans (in shares)				109,000
Stock-based compensation plans	33,558			$ 140	33,189	229
Cancellation of shares (in shares)				(73,000)
Cancellation of shares	0			$ (97)	97
Net loss	(345,008)							(345,008)
Other comprehensive income (loss)	$ 47,201						47,201
Ending balance (in shares) at Dec. 31, 2020	49,447,473			49,447,473
Ending balance at Dec. 31, 2020	$ 1,118,829			$ 76,300	$ 1,768,156	$ (1,034)	$ 27,809	$ (752,402)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member

[1] Refer to “Note 23. New Accounting Pronouncements”