Deferred Costs and Other Intangibles - Components of Deferred Costs and Intangibles (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Acquired Indefinite-lived Intangible Assets
Deferred leasing costs	$ 12,866	$ 8,692
Deferred financing costs	12,804	12,454
Intangible assets:
Intangible assets	53,624	26,498
Less: accumulated amortization	(37,225)	(16,069)
Total	16,399	10,429
In-place lease values
Intangible assets:
Intangible assets	22,754	152
Trademark
Intangible assets:
Intangible assets	3,100	3,100
Database
Intangible assets:
Intangible assets	$ 2,100	$ 2,100