Other (Income) Expense Foreign Currency Gain Loss by Currency (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Income Expense [Line Items]
Foreign exchange (gain) loss, net	$ 1,160	$ 1,725	$ 2,598
Australian Dollar [Member]
Other Income Expense [Line Items]
Foreign exchange (gain) loss, net	174	158	183
British Pound [Member]
Other Income Expense [Line Items]
Foreign exchange (gain) loss, net	653	599	158
Canadian Dollar [Member]
Other Income Expense [Line Items]
Foreign exchange (gain) loss, net	590	489	458
Euro [Member]
Other Income Expense [Line Items]
Foreign exchange (gain) loss, net	458	469	208
Other Currencies Net [Member]
Other Income Expense [Line Items]
Foreign exchange (gain) loss, net	$ (715)	$ 10	$ 1,591