Assets Held for Sale and Discontinued Operations (Tables)

9 Months Ended

Sep. 30, 2011

Assets Held for Sale and Discontinued Operations [Abstract]

Income attributable to discontinued operations

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Rental income	$	4,415		$	42,234		$	19,178		$	128,603
Rental expenses		(2,142	)		(12,795	)		(6,191	)		(36,400	)
Depreciation and amortization		(1,472	)		(10,882	)		(2,553	)		(33,101	)
Other expenses		(124	)		—			(230	)		—
Income attributable to disposed properties and assets held for sale		677			18,557			10,204			59,102
Net gains recognized on dispositions		11,410			10,026			26,120			20,004
Impairment charges		—			—			(2,659	)		—
Income tax on dispositions		—			(2,000	)		(1,916	)		(2,851	)
Total discontinued operations	$	12,087		$	26,583		$	31,749		$	76,255

Number of properties, proceeds and gains from dispositions, including minor adjustments

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Number of properties		16		4		54		13
Net proceeds from dispositions	$	93,924	$	51,573	$	661,914	$	69,014
Net gains from dispositions, net of related impairment charges and taxes	$	11,410	$	8,026	$	21,545	$	17,153