Deferred Costs and Other Intangibles, Net - Components of Deferred Costs and Intangibles (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Acquired Indefinite-lived Intangible Assets
Deferred leasing costs	$ 11,069	$ 7,030
Deferred financing costs	11,244	11,244
Intangible assets:
Intangible assets	24,430	23,653
Less: accumulated amortization	(10,993)	(10,628)
Total	13,437	13,025
Value of in-place leases
Intangible assets:
Intangible assets	17	179
Trademark
Intangible assets:
Intangible assets	0	3,100
Database
Intangible assets:
Intangible assets	$ 2,100	$ 2,100