Deferred Costs and Other Intangibles, Net - Components of Deferred Costs and Intangibles (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Acquired Indefinite-lived Intangible Assets
Deferred leasing costs	$ 14,985	$ 8,692
Deferred financing costs	6,520	12,454
Intangible assets:
Intangible assets	49,057	26,498
Less: accumulated amortization	(34,041)	(16,069)
Total	15,016	10,429
Value of in-place leases
Intangible assets:
Intangible assets	22,352	152
Trademark
Intangible assets:
Intangible assets	3,100	3,100
Database
Intangible assets:
Intangible assets	$ 2,100	$ 2,100