Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019	Jan. 01, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI before tax, beginning balance	$ (7,979)	$ (5,336)
Accumulated other comprehensive income, tax, beginning balance	(745)	(970)
Accumulated Other Comprehensive Income Beginning Balance	(7,234)	(4,366)
Cumulative effect of new accounting principle in period of adoption			$ 1,582	$ 274
Other comprehensive income (loss), net of tax	854	(213)
AOCI before tax, ending balance	(7,121)	(5,539)
Accumulated other comprehensive income, tax, ending balance	(741)	(960)
Accumulated Other Comprehensive Income Ending Balance	(6,380)	(4,579)
Accumulated Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI before tax, beginning balance	(5,939)	(2,698)
Other comprehensive income adjustments	842	110
Other comprehensive income (loss), net of tax	842	110
AOCI before tax, ending balance	(5,097)	(2,588)
Accumulated Defined Benefit Plans Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive income adjustments	16	37
Other comprehensive income (loss), tax	4	10
Other comprehensive income (loss), net of tax	12	27
Minimum pension and post retirement benefit plan adjustments | Accumulated Defined Benefit Plans Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI before tax, beginning balance	(2,040)	(2,638)
Other comprehensive income adjustments	16	37
AOCI before tax, ending balance	$ (2,024)	$ (2,951)
Accounting Standards Update 2018-02
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption				$ (350)