Stockholders' Equity of the Company Stockholders' Equity of the Company (Tables)

12 Months Ended

Dec. 31, 2012

Equity [Abstract]

Schedule of Dividends Payable [Table Text Block]

The following tables summarize accrued dividends and distributions for the noted outstanding shares of common stock, preferred stock, and noncontrolling units as of December 31, 2012 and 2011:

	December 31,
	2012		2011
	(in thousands)
Dividends and Distributions payable to:
Common stockholders	$	26,224	$	20,587
Noncontrolling common unitholders of the Operating Partnership	639		601
RSU holders (1)	367		295
Total accrued dividends and distribution to common stockholders and noncontrolling unitholders	27,230		21,483
Preferred stockholders	1,694		1,209
Total accrued dividends and distributions	$	28,924	$	22,692

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(1) The amount includes the value of the dividend equivalents that will be paid with additional fully-vested RSUs (see Note 12)

Schedule of Stock by Class [Table Text Block]

	December 31,
	2012	2011
Outstanding Shares and Units:
Common stock (1)	74,926,981	58,819,717
Noncontrolling common units	1,826,503	1,718,131
RSUs (2)	1,048,863	842,675
Series E Preferred stock		1,610,000
Series F Preferred stock		3,450,000
Series G Preferred stock	4,000,000
Series H Preferred stock	4,000,000

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(1) The amount includes nonvested shares.

(2) The amount includes nonvested RSUs.