Disposition of Hotel Properties and Discontinued Operations (Narrative) (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018 USD ($) property	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) property	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($) property	Dec. 31, 2017 USD ($) property	Dec. 31, 2016 USD ($) property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of hotels	16								16
Number of hotels reclassified as held for sale that represent a strategic shift									0
Net gain on disposition of assets | $	$ (17)	$ 3,716	$ 1,895	$ (24)	$ 2,004	$ (46)	$ 4,852	$ (3)	$ 5,570	$ 6,807	$ 23,132
Sold [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of hotels	4				8				4	8	25
Net gain on disposition of assets | $									$ 5,707	$ 7,049	$ 24,256
Held For Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of hotels	1				3				1	3
Number of hotels reclassified as held for sale									2
Continuing Operations [Member] | Sold [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net gain on disposition of assets | $									$ 5,707	$ 7,049	$ 23,575