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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 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Finite-Lived Intangible Assets, Net [Abstract]          
Deferred leasing costs and lease intangibles, net $ 236,582   $ 236,582   $ 239,029
Other Liabilities, Unclassified [Abstract]          
Below and above market ground leases, net 41,729   41,729   49,540
Amortization of above- and below-market leases, net     (7,042) $ (10,405)  
Below Market Leases          
Other Liabilities, Unclassified [Abstract]          
Below and above market ground leases 91,686   91,686   103,597
Below and above market ground leases, accumulated amortization (50,898)   (50,898)   (55,019)
Below and above market ground leases, net 40,788   40,788   48,578
Amortization of above- and below-market leases, net 3,640 $ 6,584 7,925 13,672  
Above Market Ground Leases          
Other Liabilities, Unclassified [Abstract]          
Below and above market ground leases 1,095   1,095   1,095
Below and above market ground leases, accumulated amortization (154)   (154)   (133)
Below and above market ground leases, net 941   941   962
Amortization of above- and below-market leases, net 11 11 22 22  
Above-market leases          
Finite-Lived Intangible Assets, Net [Abstract]          
Deferred leasing costs and lease intangibles 9,236   9,236   18,028
Accumulated amortization (7,122)   (7,122)   (15,131)
Deferred leasing costs and lease intangibles, net 2,114   2,114   2,897
Other Liabilities, Unclassified [Abstract]          
Amortization of above- and below-market leases, net (409) (1,911) (883) (3,267)  
Deferred leasing costs and in-place lease intangibles          
Finite-Lived Intangible Assets, Net [Abstract]          
Deferred leasing costs and lease intangibles 288,353   288,353   301,945
Accumulated amortization (114,569)   (114,569)   (127,703)
Deferred leasing costs and lease intangibles, net 173,784   173,784   174,242
Other Liabilities, Unclassified [Abstract]          
Amortization of above- and below-market leases, net (11,423) (20,644) (23,119) (40,437)  
Below-market ground leases          
Finite-Lived Intangible Assets, Net [Abstract]          
Deferred leasing costs and lease intangibles 68,388   68,388   68,388
Accumulated amortization (7,704)   (7,704)   (6,498)
Deferred leasing costs and lease intangibles, net 60,684   60,684   $ 61,890
Other Liabilities, Unclassified [Abstract]          
Amortization of above- and below-market leases, net $ (603) $ (844) $ (1,238) $ (1,492)