Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	$ (6,112)	$ (7,979)
Balance at end of period	(3,298)	(6,112)	$ (7,979)
Tax (Benefit) Expense
Balance at beginning of period	(721)	(745)
Minimum post retirement benefit plan adjustments	(116)	24
Balance at end of period	(837)	(721)	(745)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(5,391)	(7,234)
Minimum post retirement benefit plan adjustments	(371)	77
Foreign currency translation adjustment	(2,930)	(1,843)	2,868
Balance at end of period	(2,461)	(5,391)	(7,234)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(4,173)	(5,939)
Other Comprehensive Income (Loss), before Tax	3,301	1,766
Balance at end of period	(872)	(4,173)	(5,939)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Foreign currency translation adjustment	3,301	1,766
Minimum post retirement benefit plan adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(1,939)	(2,040)
Other Comprehensive Income (Loss), before Tax	487	(101)
Balance at end of period	$ (2,426)	$ (1,939)	$ (2,040)