Derivative Instruments and Hedging Activities Open Foreign Currency Contracts (Details) - Cash Flow Hedging - Foreign Exchange Contract - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Derivative [Line Items]
Notional Amounts (in U.S. Dollars)	$ 111,600	$ 134,400
Net Unrealized Gain (Loss)	(2,900)	(100)
Australian Dollar
Derivative [Line Items]
Notional Amounts (in U.S. Dollars)	5,900	16,000
Net Unrealized Gain (Loss)	(100)	(100)
Canadian Dollar
Derivative [Line Items]
Notional Amounts (in U.S. Dollars)	75,300	101,400
Net Unrealized Gain (Loss)	700	(1,100)
Mexican Peso
Derivative [Line Items]
Notional Amounts (in U.S. Dollars)	30,400	17,000
Net Unrealized Gain (Loss)	$ (3,500)	$ 1,100