CONSOLIDATED STATEMENTS OF EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid in Capital	Retained Earnings (Deficit)	Cumulative Dividends	Accumulated Other Comprehensive Loss	Non-Controlling Interest in Consolidated Joint Ventures	Comprehensive Income (Loss)	Series A Cumulative Redeemable Preferred Stock Preferred Stock	Series D Cumulative Redeemable Preferred Stock Preferred Stock
Balance at Dec. 31, 2008	$ 914,812	$ 479	$ 829,274	$ 260,659	$ (347,922)	$ (3,928)			$ 176,250
Balance (in shares) at Dec. 31, 2008		47,864,654							7,050,000
Increase (Decrease) in Stockholders' Equity
Net proceeds from sale of common stock	257,075	437	256,638
Net proceeds from sale of common stock (in shares)		43,700,000
Vesting of restricted common stock	4,290	3	4,287
Vesting of restricted common stock (in shares)		290,264
Common dividends at $0.60 per share		50	29,006		(29,056)
Common dividends (in shares)		5,049,157
Series A preferred dividends and dividends payable at $2.00 per share	(14,100)				(14,100)
Series C preferred dividends and dividends payable at $1.572 per share	(6,449)				(6,449)
Accretion of discount on Series C preferred stock	(200)		(200)
Net income (loss)	(269,608)			(269,608)				(269,608)
Pension liability adjustment	947					947		947
Comprehensive income (loss)	(268,661)							(268,661)
Balance at Dec. 31, 2009	886,767	969	1,119,005	(8,949)	(397,527)	(2,981)			176,250
Balance (in shares) at Dec. 31, 2009		96,904,075							7,050,000
Increase (Decrease) in Stockholders' Equity
Net proceeds from sale of common stock	190,642	195	190,447
Net proceeds from sale of common stock (in shares)		19,500,000
Vesting of restricted common stock	4,156	6	4,150
Vesting of restricted common stock (in shares)		546,429
Series A preferred dividends and dividends payable at $2.00 per share	(14,100)				(14,100)
Series C preferred dividends and dividends payable at $1.572 per share	(6,448)				(6,448)
Accretion of discount on Series C preferred stock	(104)		(104)
Net income (loss)	38,542			38,542				38,542
Pension liability adjustment	(156)					(156)		(156)
Comprehensive income (loss)	38,386							38,386
Balance at Dec. 31, 2010	1,099,299	1,170	1,313,498	29,593	(418,075)	(3,137)			176,250
Balance (in shares) at Dec. 31, 2010		116,950,504							7,050,000
Increase (Decrease) in Stockholders' Equity
Net proceeds from sale of preferred stock	110,948		(4,052)							115,000
Net proceeds from sale of preferred stock (in shares)										4,600,000
Vesting of restricted common stock	3,123	3	3,120
Vesting of restricted common stock (in shares)		314,586
Non-controlling interest assumed at acquisition	61,067						61,067
Distributions to non-controlling interests	(1,342)						(1,342)
Series A preferred dividends and dividends payable at $2.00 per share	(14,100)				(14,100)
Series C preferred dividends and dividends payable at $1.572 per share	(6,448)				(6,448)
Series D preferred dividends and dividends payable at $1.472222 per share	(6,773)				(6,773)
Net income (loss)	81,299			80,987			312	81,299
Pension liability adjustment	(1,779)					(1,779)		(1,779)
Comprehensive income (loss)	79,520							79,520
Balance at Dec. 31, 2011	$ 1,325,294	$ 1,173	$ 1,312,566	$ 110,580	$ (445,396)	$ (4,916)	$ 60,037		$ 176,250	$ 115,000
Balance (in shares) at Dec. 31, 2011		117,265,090							7,050,000	4,600,000