Investment In Unconsolidated Joint Ventures (Investment In Unconsolidated Joint Ventures) (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Sep. 27, 2018
Investments in Unconsolidated Joint Ventures [Line Items]
Investment in unconsolidated joint ventures	$ 8,446,000	$ 4,004,000
Cindat Hersha Owner JV, LLC [Member]
Investments in Unconsolidated Joint Ventures [Line Items]
Percent Owned	31.20%
Cindat Hersha Owner JV, LLC [Member] | Hilton and IHG branded hotels in NYC [Member]
Investments in Unconsolidated Joint Ventures [Line Items]
Percent Owned	31.20%
Investment in unconsolidated joint ventures	$ 0	0
Hiren Boston, LLC [Member] | Courtyard by Marriott, Boston, MA [Member]
Investments in Unconsolidated Joint Ventures [Line Items]
Percent Owned	50.00%
Investment in unconsolidated joint ventures	$ 1,434,000	1,879,000
SB Partners, LLC [Member] | Holiday Inn Express, Boston, MA [Member]
Investments in Unconsolidated Joint Ventures [Line Items]
Percent Owned	50.00%
Investment in unconsolidated joint ventures	$ 0	1,125,000
SB Partners Three, LLC [Member] | Home2 Suites, South Boston, MA [Member]
Investments in Unconsolidated Joint Ventures [Line Items]
Percent Owned			50.00%
Investment in unconsolidated joint ventures	$ 7,012,000	$ 1,000,000