Sale of Hotel Properties (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) hotel	Mar. 31, 2017 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Hotel properties sold, Number | hotel	2
Disposal of hotel properties	$ 119,200
Loss on sale of hotel properties	(3,734)	$ (60)
Gain (Loss) on Extinguishment of Debt	7,659	$ 0
Embassy Suites Boston Marlborough & Sheraton Philadelphia Society Hill [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (Loss) on Extinguishment of Debt	$ 5,100