Organization And Basis Of Presentation (Details)	12 Months Ended		0 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Aug. 04, 1994 IPO [Member]
Subsidiary, Sale of Stock [Line Items]
Initial public offering of common stock			5,408,000
Number of communities, owned	124
Number of apartments	41,951
Ownership in partnership	81.80%	77.10%
Noncontrolling interest in partnership	18.20%	22.90%
Interest owned in Operating Partnership	1.00%
Percentage of holdings as limited partner	100.00%