Risk Management and Use of Derivative Financial Instruments - Information Regarding Derivative Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Derivatives, Fair Value
Derivative assets, fair value, net	$ 17,904	$ 16,798
Derivative liability, fair value, net	(3,404)	(5,411)
Derivatives Designated as Hedging Instruments | Accounts receivable and other assets, net | Foreign currency forward contracts
Derivatives, Fair Value
Derivative assets, fair value, net	14,130	14,382
Derivatives Designated as Hedging Instruments | Accounts receivable and other assets, net | Interest rate swaps
Derivatives, Fair Value
Derivative assets, fair value, net	1,235	314
Derivatives Designated as Hedging Instruments | Accounts receivable and other assets, net | Interest rate caps
Derivatives, Fair Value
Derivative assets, fair value, net	145	201
Derivatives Designated as Hedging Instruments | Accounts payable, accrued expenses and other liabilities | Interest rate swaps
Derivatives, Fair Value
Derivative liability, fair value, net	(2,320)	(3,852)
Derivatives Designated as Hedging Instruments | Accounts payable, accrued expenses and other liabilities | Foreign currency collars
Derivatives, Fair Value
Derivative liability, fair value, net	(957)	(1,431)
Derivatives Not Designated as Hedging Instruments | Accounts receivable and other assets, net | Foreign currency forward contracts
Derivatives, Fair Value
Derivative assets, fair value, net	480	86
Derivatives Not Designated as Hedging Instruments | Accounts receivable and other assets, net | Stock warrants
Derivatives, Fair Value
Derivative assets, fair value, net	1,914	1,815
Derivatives Not Designated as Hedging Instruments | Accounts payable, accrued expenses and other liabilities | Interest rate swaps
Derivatives, Fair Value
Derivative liability, fair value, net	$ (127)	$ (128)