Commitments to Acquire/Dispose of Real Estate (Tables)

6 Months Ended

Jun. 30, 2011

Commitments to Acquire Dispose of Real Estate [Abstract]

Real estate to be acquired

	Properties		Apartment Units		Purchase Price
Rental Properties		5		851	$	223,025
Land Parcels (three)		—		—		29,100
Total		5		851	$	252,125

Real estate to be dispose of

	Properties		Apartment Units		Sales Price
Rental Properties		6		1,961	$	173,900
Total		6		1,961	$	173,900