INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Income Or Loss From Unconsolidated Joint Ventures) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments in Unconsolidated Joint Ventures
(Loss) Income from Unconsolidated Joint Venture Investments	$ (434)	$ (611)	$ (589)	$ (658)	$ (749)	$ (669)	$ (502)	$ (1,018)	$ (2,292)	$ (2,938)	$ 691
Cindat Hersha Owner JV, LLC
Investments in Unconsolidated Joint Ventures
(Loss) Income from Unconsolidated Joint Venture Investments									(229)	0	0
Hiren Boston, LLC
Investments in Unconsolidated Joint Ventures
(Loss) Income from Unconsolidated Joint Venture Investments									(1,104)	(1,741)	155
SB Partners, LLC
Investments in Unconsolidated Joint Ventures
(Loss) Income from Unconsolidated Joint Venture Investments									(185)	(600)	626
SB Partners Three, LLC
Investments in Unconsolidated Joint Ventures
(Loss) Income from Unconsolidated Joint Venture Investments									$ (774)	$ (597)	$ (90)