Noncontrolling Interests (Tables)

3 Months Ended

Mar. 31, 2012

Noncontrolling Interest [Abstract]

Noncontrolling Interests in the Operating Partnership [Table Text Block]

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

	Three Months Ended March 31,
	2012			2011
Beginning noncontrolling interests in the Operating Partnership	$	110,655		$	120,838
Adjustments of noncontrolling interests in the Operating Partnership to fair value	14,366			13,081
Conversion of Common Units to Common Stock	(63		)	(186		)
Net income attributable to noncontrolling interests in the Operating Partnership	827			507
Distributions to noncontrolling interests in the Operating Partnership	(1,584		)	(1,610		)
Total noncontrolling interests in the Operating Partnership	$	124,201		$	132,630

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 March 31,
	2012		2011
Net income available for common stockholders	$	16,694	$	10,136
Increase in additional paid in capital from conversion of Common Units to Common Stock	63		186
Change from net income available for common stockholders and transfers from noncontrolling interests	$	16,757	$	10,322