Restatement of Previously Issued Financial Statements - Statements of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)	$ 7,760	$ 21,512	$ (618)	$ (3,385)	$ 29,272	$ (4,003)
Foreign currency translation adjustment	488		113		1,545	327
(Loss) gain on long-term intra-entity foreign currency transactions	31		121		(4,879)	136
Cash flow hedging activity	137		(877)		(25)	(1,299)
Reclassification of hedging activities into earnings	(392)		144		(282)	146
Pension plan adjustment			0			0
Reclassification of pension adjustments into earnings	97		102		292	186
Total other comprehensive loss, net of tax	361		(397)		(3,349)	(504)
Comprehensive income (loss)	$ 8,121		(1,015)		$ 25,923	(4,507)
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)			(944)			(2,705)
Foreign currency translation adjustment			226			556
(Loss) gain on long-term intra-entity foreign currency transactions			121			136
Cash flow hedging activity			(877)			(1,443)
Reclassification of hedging activities into earnings			144			146
Pension plan adjustment			0			0
Reclassification of pension adjustments into earnings			102			92
Total other comprehensive loss, net of tax			(284)			(513)
Comprehensive income (loss)			(1,228)			(3,218)
Restatement Impacts
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)			326			(1,298)
Foreign currency translation adjustment			(113)			(229)
(Loss) gain on long-term intra-entity foreign currency transactions			0			0
Cash flow hedging activity			0			144
Reclassification of hedging activities into earnings			0			0
Pension plan adjustment			0			0
Reclassification of pension adjustments into earnings			0			94
Total other comprehensive loss, net of tax			(113)			9
Comprehensive income (loss)			$ 213			$ (1,289)