Derivative Financial Instruments - Fair Value Derivatives (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Interest rate swap agreements		$ 3
Derivatives designated as hedging instruments | Interest rate swap agreements
Derivative [Line Items]
Interest rate swap agreements	$ 0	3
Derivative liability	15,989	9,241
Derivatives designated as hedging instruments | Prepaid expenses and other current assets | Interest rate swap agreements
Derivative [Line Items]
Interest rate swap agreements	0	3
Derivatives designated as hedging instruments | Accrued expenses and other current liabilities | Interest rate swap agreements
Derivative [Line Items]
Derivative liability	15,989	782
Derivatives designated as hedging instruments | Derivative liabilities | Interest rate swap agreements
Derivative [Line Items]
Derivative liability	$ 0	$ 8,459