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BASIS OF PRESENTATION (Narrative) (Details)	1 Months Ended		3 Months Ended				6 Months Ended	9 Months Ended
BASIS OF PRESENTATION (Narrative) (Details)	Oct. 31, 2020 USD ($)	Apr. 30, 2020 USD ($)	Sep. 30, 2020 USD ($) property shares	Jun. 30, 2020 USD ($) property	Mar. 31, 2020 property	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) property shares	Sep. 30, 2020 USD ($) property shares	Sep. 30, 2019 USD ($)	Apr. 02, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)
Noncontrolling Interest [Abstract]
Share conversion ratio (shares) \| shares			1				1	1
Loss attributable to noncontrolling interest			$ 0			$ 0		$ 0	$ 300,000
Total Equity			$ 709,591,000				$ 709,591,000	709,591,000			$ 871,801,000
Proceed from line of credit								$ 67,000,000	36,000,000
Subsequent Event
Noncontrolling Interest [Abstract]
Increase of line of credit facility	$ 11,000,000
Buildings and Improvements \| Maximum
Noncontrolling Interest [Abstract]
Useful life of buildings and improvements								40 years
Furniture, Fixtures and Equipment \| Minimum
Noncontrolling Interest [Abstract]
Useful life of buildings and improvements								2 years
Furniture, Fixtures and Equipment \| Maximum
Noncontrolling Interest [Abstract]
Useful life of buildings and improvements								7 years
Revolving Line Of Credit
Noncontrolling Interest [Abstract]
Revolving line of credit, increase (decrease) In borrowing capacity										$ 100,000,000
Proceed from line of credit		$ 25,000,000					$ 45,000,000
Hotel
Noncontrolling Interest [Abstract]
Number of real estate properties closed during period (property) \| property					21
Number of real estate properties (property) \| property			3		49		3	3
Number of real estate properties opened during period (property) \| property			8	5
Number of real estate properties closed (property) \| property			8				8	8
Noncontrolling Interests Common Units And LTIP Units
Noncontrolling Interest [Abstract]
Noncontrolling interests in nonredeemable common units			$ 52,279,000				$ 52,279,000	$ 52,279,000			64,144,000
Nonredeemable common units outstanding (in shares) \| shares			5,392,808				5,392,808	5,392,808
Fair market value of nonredeemable common units			$ 29,876,000				$ 29,876,000	$ 29,876,000
Total Equity			52,279,000	$ 55,715,000		64,271,000	52,279,000	52,279,000	64,271,000		64,144,000	$ 64,574,000	$ 62,010,000
Consolidated Joint Ventures
Noncontrolling Interest [Abstract]
Adjustment to Record Noncontrolling Interest at Redemption Value						340,000		(3,196,000)	488,000
Total Equity			0	0		3,196,000	0	0	3,196,000		3,196,000	2,856,000	2,708,000
Additional Paid-In Capital
Noncontrolling Interest [Abstract]
Adjustment to Record Noncontrolling Interest at Redemption Value						(340,000)		3,196,000	(488,000)
Total Equity			$ 1,150,057,000	$ 1,149,291,000		$ 1,143,764,000	$ 1,150,057,000	$ 1,150,057,000	$ 1,143,764,000		$ 1,144,808,000	$ 1,152,939,000	$ 1,155,776,000
Senior Common Equity Interest
Noncontrolling Interest [Abstract]
Noncontrolling interest, common equity interest, return								12.00%
Consolidated Joint Ventures
Noncontrolling Interest [Abstract]
Cumulative return on common equity interest (percent)			30.00%				30.00%	30.00%
Consolidated Joint Ventures \| Senior Common Equity Interest
Noncontrolling Interest [Abstract]
Cumulative return on common equity interest (percent)			25.00%				25.00%	25.00%
Consolidated Joint Ventures \| Junior Common Equity Interest \| Scenario, Plan
Noncontrolling Interest [Abstract]
Noncontrolling interest, common equity interest, return								8.00%
Hersha Holding RC Owner, LLC
Noncontrolling Interest [Abstract]
Cumulative return on common equity interest (percent)			70.00%				70.00%	70.00%
Hersha Holding RC Owner, LLC \| Senior Common Equity Interest
Noncontrolling Interest [Abstract]
Noncontrolling interest, common equity interest, return								8.00%
Cumulative return on common equity interest (percent)			75.00%				75.00%	75.00%
Ritz-Carlton Coconut Grove, FL \| Consolidated Joint Ventures
Noncontrolling Interest [Abstract]
Noncontrolling interest, ownership percentage			15.00%				15.00%	15.00%
Hersha Hospitality Limited Partnership
Class of Stock
Approximate ownership percentage in the partnership (percent)			87.80%				87.80%	87.80%
General partnership interest (percent)								1.00%