Noncontrolling Interests (Tables)

9 Months Ended

Sep. 30, 2012

Noncontrolling Interest [Abstract]

Noncontrolling Interests in the Operating Partnership [Table Text Block]

The following table sets forth noncontrolling interests in the Operating Partnership:

	Nine Months Ended September 30,
	2012			2011
Beginning noncontrolling interests in the Operating Partnership	$	110,655		$	120,838
Adjustments of noncontrolling interests in the Operating Partnership to fair value	12,485			(10,177		)
Issuances of Common Units	2,299			—
Conversion of Common Units to Common Stock	(731		)	(1,344		)
Net income attributable to noncontrolling interests in the Operating Partnership	3,166			1,496
Distributions to noncontrolling interests in the Operating Partnership	(4,733		)	(4,818		)
Total noncontrolling interests in the Operating Partnership	$	123,141		$	105,995

Net Income Available for Common Stockholders and Transfers From Noncontrolling Interests in the Operating Partnership [Table Text Block]

The following table sets forth net income available for common stockholders and transfers from noncontrolling interests in the Operating Partnership:

	Three Months Ended September 30,					Nine Months Ended September 30,
	2012			2011		2012			2011
Net income available for common stockholders	$	33,357		$	7,002	$	63,013		$	27,250
Increase in additional paid in capital from conversion of Common Units to Common Stock	100			709		731			1,344
Issuances of Common Units	(2,299		)	—		(2,299		)	—
Change from net income available for common stockholders and transfers from noncontrolling interests	$	31,158		$	7,711	$	61,445		$	28,594