This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(12))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(10))
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66022249&loc=d3e33749-111570

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(13)(f))
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Investment In Unconsolidated Joint Ventures (Income Or Loss From Unconsolidated Joint Ventures) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Investments in Unconsolidated Joint Ventures [Line Items]
Income (Loss) from Unconsolidated Joint Venture Investments	$ 539	$ (3,717)	$ (2,636)	$ (2,410)
SB Partners, LLC [Member]
Investments in Unconsolidated Joint Ventures [Line Items]
Income (Loss) from Unconsolidated Joint Venture Investments	216	195	451	483
Hiren Boston, LLC [Member]
Investments in Unconsolidated Joint Ventures [Line Items]
Income (Loss) from Unconsolidated Joint Venture Investments	$ 323	406	630	692
Mystic Partners, LLC [Member]
Investments in Unconsolidated Joint Ventures [Line Items]
Income (Loss) from Unconsolidated Joint Venture Investments		(4,238)		(3,346)
Cindat Hersha Owner JV, LLC [Member]
Investments in Unconsolidated Joint Ventures [Line Items]
Income (Loss) from Unconsolidated Joint Venture Investments		$ (80)	$ (3,717)	$ (239)