Subsequent Events (Details) (USD $) In Millions, except Share data, unless otherwise specified				9 Months Ended			0 Months Ended
	Sep. 30, 2014 Senior Unsecured Credit Facility	Sep. 30, 2014 Senior Unsecured Credit Facility $225 Million Revolver	May 06, 2014 Senior Unsecured Credit Facility $225 Million Revolver	Sep. 30, 2014 Common stock	Sep. 30, 2013 Common stock	Sep. 30, 2014 Land San Antonio, TX acre	Oct. 31, 2014 Subsequent Event Series A preferred shares	Oct. 31, 2014 Subsequent Event Series B preferred shares	Oct. 31, 2014 Subsequent Event Series C preferred shares	Oct. 31, 2014 Subsequent Event Common stock	Oct. 01, 2014 Subsequent Event Common stock	Oct. 01, 2014 Subsequent Event Operating partnership Non-controlling Interests Common units	Oct. 21, 2014 Subsequent Event Hotel properties Country Inn & Suites San Antonio, TX	Oct. 21, 2014 Subsequent Event Land San Antonio, TX acre
Subsequent events
Common stock issued upon redemption of common units (in shares)				198,292	2,466,404						75,733
Common units redeemed												75,733
Area of land parcel						5.64								5.64
Maximum borrowing capacity	$ 300.0	$ 225.0	$ 225.0
Sale of property previously classified as held for sale													$ 7.9
Cash dividends declared, common stock (in dollars per share)										$ 0.1175
Cash dividends declared, preferred stock (in dollars per share)							$ 0.578125	$ 0.4921875	$ 0.4453125