Deferred Costs and Other Intangibles, Net - Amortization Expense (Details) $ in Thousands	Sep. 30, 2018 USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remaining 2018	$ 2,826
2019	5,579
2020	2,101
2021	1,964
2022	967
Total	13,437
Deferred Leasing Costs
Deferred Leasing Costs, Future Amortization Expenses [Abstract]
Remaining 2018	2,253
2019	3,315
2020	0
2021	0
2022	0
Total	5,568
Deferred Financing Costs
Debt Issuance Costs, Future Amortization Expenses [Abstract]
Remaining 2018	495
2019	1,964
2020	1,969
2021	1,964
2022	967
Total	7,359
Value of in-place leases
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remaining 2018	3
2019	0
2020	0
2021	0
2022	0
Total	3
Database
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remaining 2018	75
2019	300
2020	132
2021	0
2022	0
Total	$ 507