Stockholders' Equity - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 36,266
Other comprehensive loss	(5,156)	$ (385)
Reclassification adjustment to net loss	393	49
Tax effects	1,053	229
Ending balance	53,396	52,958
Foreign Currency
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(8,221)	(8,652)
Other comprehensive loss	(4,985)	246
Reclassification adjustment to net loss	0	0
Tax effects	1,132	(17)
Ending balance	(12,074)	(8,423)
Deferred Gain (Loss) on Cash Flow Hedging
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(341)	879
Other comprehensive loss	(171)	(631)
Reclassification adjustment to net loss	154	4
Tax effects	(35)	207
Ending balance	(393)	459
Pension Plan Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(7,570)	(9,328)
Other comprehensive loss	0	0
Reclassification adjustment to net loss	239	45
Tax effects	(44)	39
Ending balance	(7,375)	(9,244)
Accumulated Other Comprehensive Income (Loss) (1)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(16,132)	(17,101)
Ending balance	$ (19,842)	$ (17,208)

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount before tax and reclassification adjustments of other comprehensive income (loss) attributable to parent.

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Amount before tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.

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Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income (loss).

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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