Risk Management and Use of Derivative Financial Instruments - Information Regarding Derivative Instruments (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Derivatives, Fair Value    
Derivative assets, fair value, net $ 41,502 $ 43,945
Derivative liability, fair value, net (6,188) (10,841)
Designated as hedging | Other assets | Foreign currency forward contracts    
Derivatives, Fair Value    
Derivative assets, fair value, net 38,735 41,850
Designated as hedging | Other assets | Foreign currency collars    
Derivatives, Fair Value    
Derivative assets, fair value, net 522 4
Designated as hedging | Other assets | Interest rate caps    
Derivatives, Fair Value    
Derivative assets, fair value, net 79 0
Designated as hedging | Other assets | Interest rate swap    
Derivatives, Fair Value    
Derivative assets, fair value, net 54 0
Designated as hedging | Accounts payable, accrued expenses and other liabilities | Foreign currency collars    
Derivatives, Fair Value    
Derivative liability, fair value, net (4) (109)
Designated as hedging | Accounts payable, accrued expenses and other liabilities | Interest rate swap    
Derivatives, Fair Value    
Derivative liability, fair value, net (6,011) (10,732)
Not designated | Other assets | Stock warrants    
Derivatives, Fair Value    
Derivative assets, fair value, net 1,848 1,782
Not designated | Other assets | Swaption    
Derivatives, Fair Value    
Derivative assets, fair value, net 264 309
Not designated | Accounts payable, accrued expenses and other liabilities | Interest rate swap    
Derivatives, Fair Value    
Derivative liability, fair value, net $ (173) $ 0