Investments in Joint Ventures (Narrative) (Details) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Schedule of Equity Method Investments [Line Items]
Equity method investment ownership percentage		31.30%		31.30%
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions	[1]	$ 1,633,000	$ 1,909,000	$ 3,755,000	$ 3,821,000
Maximum guaranteed amount of loans utilized for construction and development activities for joint ventures		0		0
Maximum Investments by Formed Unconsolidated Joint Venture		450,000,000		450,000,000
Maximum Investments by Formed Unconsolidated Joint Venture		360,000,000		360,000,000
Fees earned for property and asset management, construction, development, and other services to joint ventures		$ 1,900,000	$ 1,500,000	$ 3,800,000	$ 3,000,000.0
Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment ownership percentage		40.00%		40.00%
Minimum [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment ownership percentage		20.00%		20.00%
Camden Resident Relief Fund [Member]
Schedule of Equity Method Investments [Line Items]
CamdenResidentReliefFundsAmount		$ 10,400,000
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions		400,000
Camden Resident Relief Fund [Member] | Non-consolidated entity [Member]
Schedule of Equity Method Investments [Line Items]
CamdenResidentReliefFundsAmount		$ 1,300,000

[1] Equity in income excludes our ownership interest of fee income from various services provided by us to the Funds.