Deferred Costs and Other Intangibles, Net - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Finite-Lived Intangible Assets [Line Items]
Amortization expense related to deferred leasing costs, in-place leases, trademark and database	$ 6,900	$ 2,800	$ 26,700	$ 10,000
Noncash amortization of deferred financing costs			7,912	5,769
Line of Credit
Finite-Lived Intangible Assets [Line Items]
Noncash amortization of deferred financing costs	$ 500	$ 600	$ 1,900	$ 1,800