Commitments to Acquire/Dispose of Real Estate (Tables)

9 Months Ended

Sep. 30, 2011

Commitments to Acquire Dispose of Real Estate [Abstract]

Real estate to be acquired

	Properties		Apartment Units		Purchase Price
Rental Properties		6		2,466	$	354,825
Land Parcels (seven)		—		—		157,987
Total		6		2,466	$	512,812

Real estate to be dispose of

	Properties		Apartment Units		Sales Price
Rental Properties		4		351	$	15,550
Total		4		351	$	15,550