Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2011

Segment Reporting [Abstract]

Schedule Of Revenues And Net Operating Income

	2011			2010			2009
Revenues
Apartments owned
Core properties	$	505,966		$	485,422		$	498,417
Non-core properties		73,853			31,051			—
Reconciling items		154			106			759
Total revenues	$	579,973		$	516,579		$	499,176
Net operating income
Apartments owned
Core properties	$	309,111		$	287,162		$	291,124
Non-core properties		46,171			18,273			—
Reconciling items		154			106			759
Net operating income, including reconciling items		355,436			305,541			291,883
General and administrative expenses		(29,145	)		(25,138	)		(24,476	)
Interest expense		(130,583	)		(124,126	)		(121,765	)
Depreciation and amortization		(144,819	)		(126,668	)		(118,573	)
Other expenses		(3,225	)		(2,871	)		—
Income from continuing operations	$	47,664		$	26,738		$	27,069

Summary Of Assets For Each Of Reportable Segments

Assets	2011		2010
Apartments owned
Core properties	$	2,851,848	$	2,870,247
Non-core properties		1,206,717		665,682
Reconciling items		94,641		98,774
Total assets	$	4,153,206	$	3,634,703