Condensed Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands		Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in Capital	Retained Earnings (Deficit)	Retained Earnings (Deficit) Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2018				30,184
Beginning balance at Dec. 31, 2018		$ 457,100	$ (767)	$ 9,053	$ 400,989	$ 81,450	$ (767)	$ (34,392)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		(24,228)				(24,228)
Foreign currency translation adjustment, net of tax		1,809						1,809
Foreign currency hedge, net of tax		210						210
Non-cash compensation		2,434			2,434
Net settlement of vested stock awards (in shares)				63
Net settlement of vested stock awards		(341)		$ 19	(360)
Ending balance (in shares) at Mar. 31, 2019				30,247
Ending Balance at Mar. 31, 2019		436,217		$ 9,072	403,063	56,455		(32,373)
Beginning balance (in shares) at Dec. 31, 2018				30,184
Beginning balance at Dec. 31, 2018		457,100	(767)	$ 9,053	400,989	81,450	(767)	(34,392)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		(25,183)
Ending balance (in shares) at Sep. 30, 2019				30,340
Ending Balance at Sep. 30, 2019		439,659		$ 9,100	408,837	55,824		(34,102)
Beginning balance (in shares) at Mar. 31, 2019				30,247
Beginning balance at Mar. 31, 2019		436,217		$ 9,072	403,063	56,455		(32,373)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		6,102				6,102
Foreign currency translation adjustment, net of tax		1,005						1,005
Foreign currency hedge, net of tax		(188)						(188)
Non-cash compensation		3,648			3,648
Net settlement of vested stock awards (in shares)				46
Net settlement of vested stock awards		(9)		$ 14	(23)
Other	[1]	324				324
Ending balance (in shares) at Jun. 30, 2019				30,293
Ending Balance at Jun. 30, 2019		447,099		$ 9,086	406,688	62,881		(31,556)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		(7,057)				(7,057)
Foreign currency translation adjustment, net of tax		(3,014)						(3,014)
Foreign currency hedge, net of tax		468						468
Non-cash compensation		2,588			2,588
Net settlement of vested stock awards (in shares)				47
Net settlement of vested stock awards		(425)		$ 14	(439)
Ending balance (in shares) at Sep. 30, 2019				30,340
Ending Balance at Sep. 30, 2019		439,659		$ 9,100	408,837	55,824		(34,102)
Beginning balance (in shares) at Dec. 31, 2019				30,519
Beginning balance at Dec. 31, 2019		436,670	(1,034)	$ 9,153	409,034	48,673	(1,034)	(30,190)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		(199,727)				(199,727)
Foreign currency translation adjustment, net of tax		(9,861)						(9,861)
Foreign currency hedge, net of tax		200						200
Non-cash compensation		1,530			1,530
Net settlement of vested stock awards (in shares)				109
Net settlement of vested stock awards		(349)		$ 30	(379)
Ending balance (in shares) at Mar. 31, 2020				30,628
Ending Balance at Mar. 31, 2020		$ 227,429		$ 9,183	410,185	(152,088)		(39,851)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201602Member
Beginning balance (in shares) at Dec. 31, 2019				30,519
Beginning balance at Dec. 31, 2019		$ 436,670	$ (1,034)	$ 9,153	409,034	48,673	$ (1,034)	(30,190)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		(222,328)
Ending balance (in shares) at Sep. 30, 2020				30,628
Ending Balance at Sep. 30, 2020		$ 213,500		$ 9,183	412,727	(174,689)		(33,721)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member
Beginning balance (in shares) at Mar. 31, 2020				30,628
Beginning balance at Mar. 31, 2020		$ 227,429		$ 9,183	410,185	(152,088)		(39,851)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		(13,528)				(13,528)
Foreign currency translation adjustment, net of tax		3,832						3,832
Foreign currency hedge, net of tax		(212)						(212)
Non-cash compensation		1,415			1,415
Ending balance (in shares) at Jun. 30, 2020				30,628
Ending Balance at Jun. 30, 2020		218,936		$ 9,183	411,600	(165,616)		(36,231)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		(9,073)				(9,073)
Foreign currency translation adjustment, net of tax		2,970						2,970
Foreign currency hedge, net of tax		(460)						(460)
Non-cash compensation		1,128			1,128
Net settlement of vested stock awards		(1)			(1)
Ending balance (in shares) at Sep. 30, 2020				30,628
Ending Balance at Sep. 30, 2020		$ 213,500		$ 9,183	$ 412,727	$ (174,689)		$ (33,721)

[1] Amount reflects a revision of tax effects for the adoption of ASC 842.