Other (Income) Expense Foreign Currency Gain Loss by Currency (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other (Income) Expense [Line Items]
Gain (loss) by currency	$ (98)	$ (218)	$ (674)	$ (181)
British Pound [Member]
Other (Income) Expense [Line Items]
Gain (loss) by currency	100	165	12	178
Canadian Dollar [Member]
Other (Income) Expense [Line Items]
Gain (loss) by currency	(419)	29	304	88
Euro [Member]
Other (Income) Expense [Line Items]
Gain (loss) by currency	(90)	92	(88)	2
Other Currencies Net [Member]
Other (Income) Expense [Line Items]
Gain (loss) by currency	$ 311	$ (504)	$ (902)	$ (449)