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 (Accumulated Deficit)	Retained Earnings (Accumulated 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	$ (360)	$ 9,053	$ 400,989	$ 81,450	$ (360)	$ (34,392)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(32,417)				(32,417)
Foreign currency translation adjustment, net of tax	4,258						4,258
Foreign currency hedge, net of tax	213						213
Defined benefit pension plans, net of tax	(269)						(269)
Non-cash compensation	10,055			10,055
Net settlement of vested stock awards (in shares)			335
Net settlement of vested stock awards	(1,910)		$ 100	(2,010)
Ending balance (in shares) at Dec. 31, 2019			30,519
Ending balance at Dec. 31, 2019	436,670	$ (1,035)	$ 9,153	409,034	48,673	$ (1,035)	(30,190)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(237,203)				(237,203)
Foreign currency translation adjustment, net of tax	3,359			2			3,357
Foreign currency hedge, net of tax	(904)						(904)
Defined benefit pension plans, net of tax	59						59
Non-cash compensation	6,307			6,307
Net settlement of vested stock awards (in shares)			355
Net settlement of vested stock awards	(989)		$ 104	(1,093)
Extinguishment of convertible debt	(14,044)			(14,044)
Issuance of warrant, net	22,383			22,383
Ending balance (in shares) at Dec. 31, 2020			30,874
Ending balance at Dec. 31, 2020	214,603		$ 9,257	422,589	(189,565)		(27,678)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(186,019)				(186,019)
Foreign currency hedge, net of tax	(2,214)						(2,214)
Defined benefit pension plans, net of tax	3,160						3,160
Non-cash compensation	7,013			7,013
Net settlement of vested stock awards (in shares)			340
Net settlement of vested stock awards	(240)		$ 102	(342)
Issuance of warrant, net	15,564			15,564
Ending balance (in shares) at Dec. 31, 2021			31,214
Ending balance at Dec. 31, 2021	$ 51,867		$ 9,359	$ 444,824	$ (375,584)		$ (26,732)