Noncontrolling Interests (Tables)

6 Months Ended

Jun. 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:

	Six Months Ended June 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	16,501			6,957
Conversion of Common Units to Common Stock	(631		)	(635		)
Net income attributable to noncontrolling interests in the Operating Partnership	1,513			1,130
Distributions to noncontrolling interests in the Operating Partnership	(3,158		)	(3,215		)
Total noncontrolling interests in the Operating Partnership	$	124,880		$	125,075

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 June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
Net income available for common stockholders	$	12,962	$	10,112	$	29,656	$	20,248
Increase in additional paid in capital from conversion of Common Units to Common Stock	568		449		631		635
Change from net income available for common stockholders and transfers from noncontrolling interests	$	13,530	$	10,561	$	30,287	$	20,883