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Deferred Charges and Other Assets, net - Schedule of deferred charges and other assets, net (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]      
Leasing $ 219,695   $ 239,983
Intangible assets:      
In-place lease values 119,055   140,437
Leasing commissions and legal costs 28,985   32,384
Above-market leases 168,674   181,851
Deferred tax assets 48,270   38,301
Deferred compensation plan assets 43,218   42,711
Other assets 59,580   72,206
Deferred charges and other assets, gross 687,477   747,873
Less accumulated amortization (227,653)   (269,815)
Deferred charges and other assets, net 459,824   478,058
In-place lease values, leasing commissions and legal costs      
Finite-Lived Intangible Assets [Line Items]      
Accumulated amortization for intangible assets 73,493   $ 88,785
Amortization expense for intangible assets $ 6,004 $ 8,847