Risk Management and Use of Derivative Financial Instruments - Derivative Gain Loss Reclassified From OCI (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Amount of Gain (Loss) Reclassified from Other Comprehensive (Loss) Income into Income (Effective Portion)      
Derivatives, gain (loss) reclassified from AOCI to Income, effective portion, net $ 1,219 $ 246 $ (6,074)
Other income and (expense) | Foreign currency forward contracts      
Amount of Gain (Loss) Reclassified from Other Comprehensive (Loss) Income into Income (Effective Portion)      
Derivatives, gain (loss) reclassified from AOCI to Income, effective portion, net 7,558 8,083 1,145
Other income and (expense) | Foreign currency collars      
Amount of Gain (Loss) Reclassified from Other Comprehensive (Loss) Income into Income (Effective Portion)      
Derivatives, gain (loss) reclassified from AOCI to Income, effective portion, net 0 0 751
Interest expense | Interest rate swap      
Amount of Gain (Loss) Reclassified from Other Comprehensive (Loss) Income into Income (Effective Portion)      
Derivatives, gain (loss) reclassified from AOCI to Income, effective portion, net (6,339) (7,837) (7,057)
Interest expense | Interest rate cap      
Amount of Gain (Loss) Reclassified from Other Comprehensive (Loss) Income into Income (Effective Portion)      
Derivatives, gain (loss) reclassified from AOCI to Income, effective portion, net $ 0 $ 0 $ (913)