Deferred Costs and Other Intangibles, Net - Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Debt Issuance Costs, Future Amortization Expenses [Abstract]
Total	$ 39,407	$ 51,636
Deferred Leasing Costs
Deferred Leasing Costs, Future Amortization Expenses [Abstract]
Remaining 2017	1,240
2018	1,835
2019	0
2020	0
2021	0
Thereafter	0
Total	3,075
Deferred Financing Costs
Debt Issuance Costs, Future Amortization Expenses [Abstract]
Remaining 2017	495
2018	1,964
2019	1,964
2020	1,969
2021	1,964
Thereafter	967
Total	9,323
Value of in-place leases
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remaining 2017	31
2018	21
2019	2
2020	0
2021	0
Thereafter	0
Total	54
Trademark
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remaining 2017	165
2018	92
2019	0
2020	0
2021	0
Thereafter	0
Total	257
Database
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remaining 2017	75
2018	300
2019	300
2020	132
2021	0
Thereafter	0
Total	$ 807