Derivative Instruments and Hedging Activities Open Foreign Currency Contracts (Details) - Cash Flow Hedging - Foreign Exchange Contract - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Derivative [Line Items]
Notional Amounts (in U.S. Dollars)	$ 174,900	$ 134,400
Net Unrealized Gain (Loss)	(2,000)	(100)
Australian Dollar
Derivative [Line Items]
Notional Amounts (in U.S. Dollars)	11,400	16,000
Net Unrealized Gain (Loss)	(200)	(100)
Canadian Dollar
Derivative [Line Items]
Notional Amounts (in U.S. Dollars)	138,700	101,400
Net Unrealized Gain (Loss)	(300)	(1,100)
Mexican Peso
Derivative [Line Items]
Notional Amounts (in U.S. Dollars)	24,800	17,000
Net Unrealized Gain (Loss)	$ (1,500)	$ 1,100