Fair Value Measurements And Derivative Instruments (Schedule Of Impairment And Recovery Of Previously Recorded Impairment) (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	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 ($) item	Dec. 31, 2016 USD ($) item	Dec. 31, 2015 USD ($) item
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of hotels | item									5	5	11
Impairment (loss) recovery, Continuing operations, Total net impairment loss	$ (553)	$ (848)	$ (479)	$ (271)	$ (220)	$ (343)	$ (121)	$ (793)	$ (2,151)	$ (1,477)	$ (3,829)
Impairment loss, net									$ 2,151	$ 1,477	$ 3,708
Continuing Operations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of hotels | item									5	5	7
Impairment (loss) recovery, Continuing operations, Total net impairment loss									$ (2,151)	$ (1,477)	$ (3,829)
Discontinued Operations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of hotels | item											4
Net impairment loss reported in discontinued operations											$ 121
Held For Sale [Member] | Continuing Operations [Member] | Impairment Loss [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of hotels | item									1		1
Impairment (loss) recovery, Continuing operations, Held for sale hotels									$ (1,448)		$ (1,537)
Sold [Member] | Continuing Operations [Member] | Impairment Loss [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of hotels | item									2	5	5
Impairment (loss) recovery, Continuing operations, Sold hotels									$ (783)	$ (1,477)	$ (2,377)
Sold [Member] | Continuing Operations [Member] | Impairment Recovery [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of hotels | item									2		1
Impairment (loss) recovery, Continuing operations, Sold hotels									$ 80		$ 85
Sold [Member] | Discontinued Operations [Member] | Impairment Loss [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of hotels | item											1
Impairment (loss) recovery, Discontinued operations, Sold hotels											$ (117)
Sold [Member] | Discontinued Operations [Member] | Impairment Recovery [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of hotels | item											3
Impairment (loss) recovery, Discontinued operations, Sold hotels											$ 238