Risk Management and Use of Derivative Financial Instruments - Information Regarding Derivative Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Derivatives, Fair Value
Derivative assets, fair value	$ 18,368	$ 21,915
Liability derivatives, fair value	(11,804)	(7,913)
Designated as Hedging Instrument | Foreign currency contracts | Other assets, net
Derivatives, Fair Value
Derivative assets, fair value	10,073	12,737
Designated as Hedging Instrument | Foreign currency collars | Other assets, net
Derivatives, Fair Value
Derivative assets, fair value	3,196	4,931
Designated as Hedging Instrument | Foreign currency collars | Accounts payable, accrued expenses and other liabilities
Derivatives, Fair Value
Liability derivatives, fair value	(11,263)	(6,805)
Designated as Hedging Instrument | Interest rate swaps | Other assets, net
Derivatives, Fair Value
Derivative assets, fair value	1,111	523
Designated as Hedging Instrument | Interest rate swaps | Accounts payable, accrued expenses and other liabilities
Derivatives, Fair Value
Liability derivatives, fair value	(541)	(1,108)
Designated as Hedging Instrument | Interest rate cap | Other assets, net
Derivatives, Fair Value
Derivative assets, fair value	12	20
Not Designated as Hedging Instrument | Interest rate swaps | Other assets, net
Derivatives, Fair Value
Derivative assets, fair value	23	19
Not Designated as Hedging Instrument | Stock warrants | Other assets, net
Derivatives, Fair Value
Derivative assets, fair value	$ 3,953	$ 3,685