Subsequent Events (Narrative) (Details) $ / shares in Units, $ in Thousands					3 Months Ended									12 Months Ended
	Mar. 15, 2018 USD ($) room	Feb. 21, 2018 USD ($) room	Jan. 25, 2018 USD ($) room	Jan. 18, 2018 USD ($) room	Mar. 16, 2018 USD ($) property $ / shares shares	Dec. 31, 2017 USD ($) property $ / shares	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2017 USD ($) property $ / shares shares	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Feb. 28, 2017 $ / shares
Subsequent Event [Line Items]
Gain on dispositions of assets						$ 2,004	$ (46)	$ 4,852	$ (3)	$ 7,318	$ 3,591	$ 8,856	$ 3,367	$ 6,807	$ 23,132	$ 4,798
Number of hotels | property						18								18
Investment in hotel properties held for sale, net						$ 12,655				35,640				$ 12,655	35,640
Long-term debt related to hotel properties held for sale, net of deferred financing costs						4,976				$ 14,802				4,976	$ 14,802
Proceeds from common stock issued														47,468		$ 346
Series E Preferred Stock [Member]
Subsequent Event [Line Items]
Shares issued, price per share | $ / shares																	$ 13.845
Additional Hotel Property that Meets Criteria to be Considered Held For Sale [Member]
Subsequent Event [Line Items]
Investment in hotel properties held for sale, net						1,191								1,191
Long-term debt related to hotel properties held for sale, net of deferred financing costs						$ 3,089								$ 3,089
Subsequent Event [Member] | Towne Place Suites Austin North Tech Ridge [Member]
Subsequent Event [Line Items]
Number of rooms acquired | room				122
Purchase price of hotel acquisition				$ 19,750
Subsequent Event [Member] | Additional Hotel Property that Meets Criteria to be Considered Held For Sale [Member]
Subsequent Event [Line Items]
Number of hotels | property					1
Creston, Iowa [Member] | Supertel Inn [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Number of rooms sold | room			41
Gain on dispositions of assets			$ 2,050
Summerville / Charleston [Member] | Subsequent Event [Member] | Home2 Suites [Member]
Subsequent Event [Line Items]
Number of rooms acquired | room		93
Purchase price of hotel acquisition		$ 16,325
Cash paid for acquisition		1,507
South Bend, Indiana [Member] | Comfort Suites [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Number of rooms sold | room	135
Gain on dispositions of assets	$ 6,100
ATM Program [Member]
Subsequent Event [Line Items]
Issuance of common stock, shares | shares														169,004
Shares issued, price per share | $ / shares						$ 10.15								$ 10.15
Proceeds from common stock issued														$ 1,715
Net proceeds from common stock issue														$ 1,619
ATM Program [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Issuance of common stock, shares | shares					12,334
Shares issued, price per share | $ / shares					$ 10.40
Proceeds from common stock issued					$ 128
Net proceeds from common stock issue					$ 125
KeyBank Credit Facility [Member] | Summerville / Charleston [Member] | Subsequent Event [Member] | Home2 Suites [Member]
Subsequent Event [Line Items]
Debt originated at acquisition		$ 14,818