Preferred Units (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares shares	Aug. 31, 2015 shares	Jul. 22, 2015 USD ($)
Class of Stock [Line Items]
Number of company common stock issued on conversion of Series B preferred units	6.71348
Series A Preferred Units
Class of Stock [Line Items]
Fair value of embedded derivative liability | $	$ 0.0		$ 0.0
Partnership Interest | Series A Preferred Units
Class of Stock [Line Items]
Shares of common stock reserved for issuance upon redemption of units of limited partnership interest in operating partnership (shares)	109,161
Dividend rate preferred units (as a percent)	3.50%
Liquidation preference of preferred units (in dollars per share) | $ / shares	$ 1,000.00
Number of preferred units issued (in shares)		109,161
Annual dividends on preferred units (in dollars per share) | $ / shares	$ 35.00
Partnership Interest | Series B Preferred Units
Class of Stock [Line Items]
Number of preferred units issued (in shares)	0