Derivatives (Fair Value of the Company's Other Derivatives) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Not Designated as Hedging Instrument | Accrued expenses and other current liabilities | Interest rate contracts
Derivative [Line Items]
Derivative liabilities	$ (879)	$ 0	$ 0
Not Designated as Hedging Instrument | Accrued expenses and other current liabilities | Foreign currency contract
Derivative [Line Items]
Derivative liabilities			115
Not Designated as Hedging Instrument | Other long term liabilities | Interest rate contracts
Derivative [Line Items]
Derivative liabilities	(491)	(1,007)	(1,261)
Not Designated as Hedging Instrument | Other current assets | Foreign currency contract
Derivative [Line Items]
Derivative assets	326	2,742
Designated as Hedging Instrument | Accrued expenses and other current liabilities | Interest rate contracts
Derivative [Line Items]
Derivative liabilities	(8,431)	(3,118)	(2,981)
Designated as Hedging Instrument | Other long term liabilities | Interest rate contracts
Derivative [Line Items]
Derivative liabilities	$ (22,409)	$ (9,382)	$ (13,649)