Business (Narratives) (Details) $ in Millions	12 Months Ended	36 Months Ended	67 Months Ended
	Dec. 31, 2014 USD ($)	Sep. 15, 2013 USD ($)	Mar. 31, 2016 USD ($) property
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Capital interest ownership in operating partnership			99.985%
Number of properties | property			35
Proceeds from issuance, initial public offering		$ 575.8
Proceeds from follow on offering	$ 577.4
Proceeds from DRIP			$ 89.9