Fair Value of Financial Instruments - Fair Value, Financial Instruments Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities), net	$ (16,648)	$ (3,356)
Fair Value, Measurements, Recurring | Foreign currency forwards, net (GBP & EUR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities), net	424	2,726
Fair Value, Measurements, Recurring | Interest rate swaps, net (USD,GBP & EUR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities), net	(17,072)	(6,082)
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets Level 1 | Foreign currency forwards, net (GBP & EUR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities), net	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets Level 1 | Interest rate swaps, net (USD,GBP & EUR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities), net	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs Level 2 | Foreign currency forwards, net (GBP & EUR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities), net	424	2,726
Fair Value, Measurements, Recurring | Significant Other Observable Inputs Level 2 | Interest rate swaps, net (USD,GBP & EUR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities), net	(17,072)	(6,082)
Fair Value, Measurements, Recurring | Significant Unobservable Inputs Level 3 | Foreign currency forwards, net (GBP & EUR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities), net	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs Level 3 | Interest rate swaps, net (USD,GBP & EUR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities), net	$ 0	$ 0