Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI before tax, beginning balance	$ (9,146)	$ (11,985)	$ (6,112)	$ (6,106)	$ (7,121)	$ (7,979)	$ (6,112)	$ (7,979)
Accumulated other comprehensive income, tax, beginning balance	(708)	(714)	(721)	(736)	(741)	(745)	(721)	(745)
Accumulated Other Comprehensive Income Beginning Balance	(8,438)	(11,271)	(5,391)	(5,370)	(6,380)	(7,234)	(5,391)	(7,234)
Other comprehensive income (loss), net of tax	2,218			(652)			(829)	1,212
AOCI before tax, ending balance	(6,921)	(9,146)	(11,985)	(6,754)	(6,106)	(7,121)	(6,921)	(6,754)
Accumulated other comprehensive income, tax, ending balance	(701)	(708)	(714)	(732)	(736)	(741)	(701)	(732)
Accumulated Other Comprehensive Income Ending Balance	(6,220)	(8,438)	(11,271)	(6,022)	(5,370)	(6,380)	(6,220)	(6,022)
Accumulated Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI before tax, beginning balance	(7,256)	(10,071)	(4,173)	(4,099)	(5,097)	(5,939)	(4,173)	(5,939)
Other comprehensive income adjustments	2,200	2,815	(5,898)	(664)	998	842
Other comprehensive income (loss), net of tax	2,200	2,815	(5,898)	(664)	998	842
AOCI before tax, ending balance	(5,056)	(7,256)	(10,071)	(4,763)	(4,099)	(5,097)	(5,056)	(4,763)
Accumulated Defined Benefit Plans Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive income adjustments	25	24	25	16	17	16
Other comprehensive income (loss), tax	7	6	7	4	5	4
Other comprehensive income (loss), net of tax	18	18	18	12	12	12
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	(1,890)	(1,914)	(1,939)	(2,007)	(2,024)	(2,040)	(1,939)	(2,040)
Other comprehensive income adjustments	25	24	25	16	17	16
AOCI before tax, ending balance	$ (1,865)	$ (1,890)	$ (1,914)	$ (1,991)	$ (2,007)	$ (2,024)	$ (1,865)	$ (1,991)