Dispositions of Hotel Properties (Narrative) (Details) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2018 USD ($) property	Mar. 31, 2018 USD ($) property	Jun. 30, 2017 USD ($) property	Mar. 31, 2017 USD ($) property	Jun. 30, 2018 USD ($) property	Jun. 30, 2017 USD ($) property	Dec. 31, 2017 property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of hotels	17				17
Number of properties sold	1		3		3	5
Net gain on sale of properties | $					$ 1,984	$ 5,031
Number of impaired properties					1	4
Impairment (loss) recovery, net | $			$ (479)		$ 93	$ (750)
Sold [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment (loss) recovery, net | $		$ 93		$ 80
Continuing Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net gain on sale of properties | $	$ 1,947		$ 5,031
Held For Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of hotels	1	1			1		3
Impairment Loss [Member] | Sold [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of impaired properties			2			2
Impairment Recovery [Member] | Sold [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of impaired properties		1		2	1	2