Investment In Unconsolidated Joint Ventures (Income Or Loss From Unconsolidated Joint Ventures) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Investments in Unconsolidated Joint Ventures [Line Items]
(Loss) Income from Unconsolidated Joint Venture Investments	$ 587	$ (3,717)	$ 1,521	$ (214)	$ 105	$ 608	$ 526	$ (274)	$ (1,823)	$ 965	$ 693
SB Partners, LLC [Member]
Investments in Unconsolidated Joint Ventures [Line Items]
Income (Loss) from Unconsolidated Joint Ventures									618	582	407
Hiren Boston, LLC [Member]
Investments in Unconsolidated Joint Ventures [Line Items]
Income (Loss) from Unconsolidated Joint Ventures									839	694	603
Mystic Partners, LLC [Member]
Investments in Unconsolidated Joint Ventures [Line Items]
Income (Loss) from Unconsolidated Joint Ventures									(137)	$ (311)	$ (317)
Cindat Hersha Owner JV, LLC [Member]
Investments in Unconsolidated Joint Ventures [Line Items]
Income (Loss) from Unconsolidated Joint Ventures									$ (3,143)