Deferred Costs and Other Intangibles, Net - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Amortization expense related to deferred leasing costs, in-place leases, trademark and database	$ 2.5	$ 2.2
Amortization of deferred financing costs	$ 0.5	$ 0.5