Other (Income) Expense Foreign Currency Gain Loss by Currency (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Income Expense [Line Items]
Gain (loss) by currency	$ 1,725	$ 2,598	$ 951
Australian Dollar [Member]
Other Income Expense [Line Items]
Gain (loss) by currency	158	183	12
British Pound [Member]
Other Income Expense [Line Items]
Gain (loss) by currency	599	158	(92)
Canadian Dollar [Member]
Other Income Expense [Line Items]
Gain (loss) by currency	489	458	(62)
Euro [Member]
Other Income Expense [Line Items]
Gain (loss) by currency	469	208	1,413
Other Currencies Net [Member]
Other Income Expense [Line Items]
Gain (loss) by currency	$ 10	$ 1,591	$ (320)