Derivative Financial Instruments - Fair Value (Details) - USD ($) $ in Thousands	Sep. 26, 2020	Dec. 31, 2019
Derivatives not designated as hedging instruments: | Foreign currency forward contracts | Other current assets
Derivative Asset, Fair Value, Amount Not Offset Against Collateral
Derivative assets	$ 3,097	$ 1,372
Derivatives not designated as hedging instruments: | Foreign currency forward contracts | Accrued expenses and other current liabilities
Derivative Asset, Fair Value, Amount Not Offset Against Collateral
Derivatives liabilities	2,870	4,068
Derivatives not designated as hedging instruments: | Interest rate cap contracts | Other assets
Derivative Asset, Fair Value, Amount Not Offset Against Collateral
Derivative assets	0	6
Derivatives designated as hedging instruments: | Interest rate contracts | Accrued expenses and other current liabilities
Derivative Asset, Fair Value, Amount Not Offset Against Collateral
Derivatives liabilities	809	0
Derivatives designated as hedging instruments: | Interest rate contracts | Deferred credits and other liabilities
Derivative Asset, Fair Value, Amount Not Offset Against Collateral
Derivatives liabilities	$ 1,213	$ 0