Noncontrolling Interests (Tables)

3 Months Ended

Mar. 31, 2013

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,
	2013			2012
Beginning noncontrolling interests in the Operating Partnership	$	124,869		$	110,655
Adjustment of noncontrolling interests in the Operating Partnership to fair value	23,802			14,366
Conversions of Common Units to Common Stock	(351		)	(63		)
Net income attributable to noncontrolling interests in the Operating Partnership	581			827
Distributions to noncontrolling interests in the Operating Partnership	(1,584		)	(1,584		)
Total noncontrolling interests in the Operating Partnership	$	147,317		$	124,201

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,
	2013		2012
Net income available for common stockholders	$	12,349	$	16,694
Increase in additional paid in capital from conversions of Common Units to Common Stock	351		63
Change from net income available for common stockholders and transfers from noncontrolling interests	$	12,700	$	16,757