Description of Business (Narrative) (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2015 property $ / shares shares	Dec. 31, 2014 $ / shares shares	Oct. 15, 2013 $ / shares shares	Sep. 30, 2013 shares
Organization And Description Of Business [Line Items]
Number of properties | property		24
Common stock, par value | $ / shares		$ 0.01	$ 0.01
Common stock, shares issued		41,225,784	29,408,138
Net proceeds from issuance of shares | $	$ 279
Ownership interest		85.80%
Common Class A [Member]
Organization And Description Of Business [Line Items]
Common stock, par value | $ / shares				$ 0.01
Common stock, shares issued				14,087,500
Chief Executive Officer [Member]
Organization And Description Of Business [Line Items]
Common stock, shares issued					1,000