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Deferred Leasing Costs and Lease Intangibles, net - Schedule of Finite-Lived Intangible Assets and Liabilities (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Finite-Lived Intangible Assets, Net [Abstract]      
Deferred leasing costs and lease intangibles, net $ 241,912   $ 244,554
Other Liabilities, Unclassified [Abstract]      
Below and above market ground leases, net 45,651   49,930
Amortization of above- and below-market leases, net (3,811) $ (5,732)  
Below Market Leases      
Other Liabilities, Unclassified [Abstract]      
Below and above market ground leases 100,259   105,233
Below and above market ground leases, accumulated amortization (55,560)   (56,265)
Below and above market ground leases, net 44,699   48,968
Amortization of above- and below-market leases, net 4,285 7,088  
Above Market Ground Leases      
Other Liabilities, Unclassified [Abstract]      
Below and above market ground leases 1,095   1,095
Below and above market ground leases, accumulated amortization (143)   (133)
Below and above market ground leases, net 952   962
Amortization of above- and below-market leases, net 11 11  
Above-market leases      
Finite-Lived Intangible Assets, Net [Abstract]      
Deferred leasing costs and lease intangibles 11,526   19,222
Accumulated amortization (8,507)   (15,731)
Deferred leasing costs and lease intangibles, net 3,019   3,491
Other Liabilities, Unclassified [Abstract]      
Amortization of above- and below-market leases, net (474) (1,356)  
Deferred leasing costs and in-place lease intangibles      
Finite-Lived Intangible Assets, Net [Abstract]      
Deferred leasing costs and lease intangibles 298,042   311,599
Accumulated amortization (120,436)   (132,426)
Deferred leasing costs and lease intangibles, net 177,606   179,173
Other Liabilities, Unclassified [Abstract]      
Amortization of above- and below-market leases, net (11,696) (19,793)  
Below-market ground leases      
Finite-Lived Intangible Assets, Net [Abstract]      
Deferred leasing costs and lease intangibles 68,388   68,388
Accumulated amortization (7,101)   (6,498)
Deferred leasing costs and lease intangibles, net 61,287   $ 61,890
Other Liabilities, Unclassified [Abstract]      
Amortization of above- and below-market leases, net $ (635) $ (648)