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Acquisitions (Narrative) (Details) $ in Thousands					1 Months Ended		3 Months Ended	6 Months Ended
	May 01, 2019 USD ($)	Apr. 12, 2018 USD ($) a	Feb. 15, 2018 USD ($)	Jan. 11, 2018 USD ($)	May 03, 2019 USD ($)	Feb. 28, 2019 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	May 29, 2019 a	Apr. 01, 2019 a
Area of Land | a		1.8
Payments to Acquire Land		$ 11,400
Number of Units in Real Estate Property		360
Purchase Price of Operating Properties Acquired								$ 214,233	$ 201,899
Camden Rainey Street [Member]
Number of Operating properties Acquired	1
Number of Units in Real Estate Property	326
Purchase Price of Operating Properties Acquired	$ 120,400
Camden Old Town Scottsdale [Member]
Number of Operating properties Acquired						1
Number of Units in Real Estate Property						316
Purchase Price of Operating Properties Acquired						$ 97,100
Camden Pier District [Member]
Number of Operating properties Acquired				1
Number of Units in Real Estate Property				358
Purchase Price of Operating Properties Acquired				$ 126,900
Camden Hayden II [Member]
Area of Land | a										11.6
Payments to Acquire Land							$ 18,000
Number of Units in Real Estate Property										400
Camden North Quarter [Member]
Number of Operating properties Acquired			1
Number of Units in Real Estate Property			333
Purchase Price of Operating Properties Acquired			$ 81,400
Camden Chadbourne Mill [Member]
Area of Land | a											4.3
Payments to Acquire Land					$ 10,900
Number of Units in Real Estate Property											400

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Number of operating properties acquired which are now fully consolidated during the period.

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Area of land held.

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- Definition

The number of units in a real estate property owned as of the balance sheet date.

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- Definition

The cash outflow from the acquisition of real estate intended to generate income for the owner; excludes land acquired for use by the owner.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

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- Definition

The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate acquired for use by the owner.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

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