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Acquisitions and Dispositions (Narrative) (Details)																				1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 09, 2021 USD ($) a	Dec. 02, 2021 USD ($)	Nov. 09, 2021 USD ($)	Oct. 25, 2021 USD ($) a	Oct. 14, 2021 USD ($)	Aug. 24, 2021 USD ($)	Jun. 29, 2021 USD ($) a	Jun. 22, 2021 USD ($)	Jun. 02, 2021 USD ($)	Jun. 01, 2021 USD ($) a	Nov. 24, 2020 USD ($) a	Mar. 03, 2020 USD ($) a	Jan. 13, 2020 USD ($) a	Dec. 19, 2019 USD ($) a	Dec. 12, 2019 USD ($)	Dec. 05, 2019 USD ($)	May 29, 2019 USD ($) a	May 01, 2019 USD ($)	Apr. 01, 2019 USD ($) a	Feb. 28, 2019 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property																						$ 174,384,000	$ 382,000	$ 49,901,000
Payments to Acquire Real Estate																						629,959,000	0	436,305,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Property, Plant and Equipment [Line Items]
Area of Land | a												4.7
Proceeds from Sale of Land Held-for-investment												$ 800,000
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property																							$ 400,000
Camden Carolinian [Member]
Property, Plant and Equipment [Line Items]
Number of Operating properties Acquired																1
Number of Units in Real Estate Property																186
Payments to Acquire Real Estate																$ 75,100,000
Camden Highland Village [Member]
Property, Plant and Equipment [Line Items]
Number of Operating properties Acquired														1
Number of Units in Real Estate Property														552
Payments to Acquire Real Estate														$ 147,200,000
Camden Rainey Street [Member]
Property, Plant and Equipment [Line Items]
Number of Operating properties Acquired																		1
Number of Units in Real Estate Property																		326
Payments to Acquire Real Estate																		$ 120,400,000
Camden Old Town Scottsdale [Member]
Property, Plant and Equipment [Line Items]
Number of Operating properties Acquired																				1
Number of Units in Real Estate Property																				316
Payments to Acquire Real Estate																				$ 97,100,000
Camden South Bay [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Property, Plant and Equipment [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property																						6,200,000
Number of Real Estate Properties															1
Number of Units in Real Estate Property															270
Proceeds from Sale of Property, Plant, and Equipment																					$ 38,500,000
Camden Highland Village Land [Member]
Property, Plant and Equipment [Line Items]
Area of Land | a														2.3
Purchase price of land acquired														$ 8,000,000
Number of Units in Real Estate Property														300
Camden Hayden II [Member]
Property, Plant and Equipment [Line Items]
Area of Land | a																	11.6
Purchase price of land acquired																	$ 18,000,000
Number of Units in Real Estate Property																	397
Camden NoDa [Member]
Property, Plant and Equipment [Line Items]
Area of Land | a																			4.3
Purchase price of land acquired																			$ 10,900,000
Number of Units in Real Estate Property																			387
Cameron Village [Member]
Property, Plant and Equipment [Line Items]
Area of Land | a													4.9
Purchase price of land acquired													$ 18,200,000
Number of Units in Real Estate Property													355
Camden Durham
Property, Plant and Equipment [Line Items]
Area of Land | a											4.1
Purchase price of land acquired											$ 27,600,000
Number of Units in Real Estate Property											354
Camden Greenville
Property, Plant and Equipment [Line Items]
Number of Operating properties Acquired					1
Number of Units in Real Estate Property					558
Payments to Acquire Real Estate					$ 165,500,000
Camden Central
Property, Plant and Equipment [Line Items]
Number of Operating properties Acquired						1
Number of Units in Real Estate Property						368
Payments to Acquire Real Estate						$ 176,300,000
Camden Franklin park
Property, Plant and Equipment [Line Items]
Number of Operating properties Acquired									1
Number of Units in Real Estate Property									328
Payments to Acquire Real Estate									$ 105,300,000
Camden Music Row
Property, Plant and Equipment [Line Items]
Number of Operating properties Acquired								1
Number of Units in Real Estate Property								430
Payments to Acquire Real Estate								$ 186,300,000
Camden Gulch
Property, Plant and Equipment [Line Items]
Area of Land | a	2.0
Purchase price of land acquired	$ 36,600,000
Camden Baker
Property, Plant and Equipment [Line Items]
Area of Land | a				5.2
Purchase price of land acquired				$ 24,000,000
Camden Woodmill Creek
Property, Plant and Equipment [Line Items]
Area of Land | a										14.6
Purchase price of land acquired										$ 9,300,000
Camden Pier District II
Property, Plant and Equipment [Line Items]
Area of Land | a							0.2
Purchase price of land acquired							$ 2,100,000
Camden Oak Crest Park [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Property, Plant and Equipment [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property																						81,100,000
Number of Real Estate Properties			2
Number of Units in Real Estate Property			652
Proceeds from Sale of Property, Plant, and Equipment			$ 115,000,000
Corpus Christie | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Property, Plant and Equipment [Line Items]
Number of Real Estate Properties															3
Camden Breakers/Copper Ridge | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Property, Plant and Equipment [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property																								$ 49,900,000
Number of Real Estate Properties															2
Number of Units in Real Estate Property															632
Proceeds from Sale of Property, Plant, and Equipment															$ 69,400,000
Camden Russett [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Property, Plant and Equipment [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property																						$ 93,300,000
Number of Real Estate Properties		1
Number of Units in Real Estate Property		426
Proceeds from Sale of Property, Plant, and Equipment		$ 145,000,000

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