CONSOLIDATED STATEMENT OF EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total USD ($)	Common Stock USD ($)	Additional Paid in Capital USD ($)	Retained Earnings USD ($)	Cumulative Dividends USD ($)	Accumulated Other Comprehensive Loss USD ($)	Non-Controlling Interest in Consolidated Joint Ventures USD ($)	Preferred Stock, Series A	Preferred Stock, Series A Preferred Stock USD ($)	Preferred Stock, Series D Preferred Stock USD ($)
Balance at Dec. 31, 2012	$ 1,519,313	$ 1,352	$ 1,493,397	$ 158,376	$ (475,144)	$ (5,335)	$ 55,417		$ 176,250	$ 115,000
Balance (in shares) at Dec. 31, 2012		135,237,438							7,050,000	4,600,000
Increase (Decrease) in Stockholders' Equity
Net proceeds from sale of common stock	294,875	253	294,622
Net proceeds from sale of common stock (in shares)		25,300,000
Vesting of restricted common stock	1,168	3	1,165
Vesting of restricted common stock (in shares)		278,495
Redemption of Series A preferred stock	(176,250)		4,641		(4,641)				(176,250)
Redemption of Series A preferred stock (in shares)								(7,050,000)	(7,050,000)
Distributions to non-controlling interest	(457)						(457)
Series A preferred dividends and dividends payable at $0.50 per share through redemption date	(2,350)				(2,350)
Series C preferred dividends and dividends payable at $0.393 per share year to date	(1,612)				(1,612)
Series D preferred dividends and dividends payable at $0.50 per share year to date	(2,300)				(2,300)
Net income	28,926			28,629			297
Pension liability adjustment	5,335					5,335
Balance at Mar. 31, 2013	1,666,648	1,608	1,793,825	187,005	(486,047)		55,257			115,000
Balance (in shares) at Mar. 31, 2013		160,815,933								4,600,000
Balance at Feb. 28, 2013
Increase (Decrease) in Stockholders' Equity
Redemption of Series A preferred stock (in shares)								(7,050,000)
Balance at Mar. 31, 2013										$ 115,000
Balance (in shares) at Mar. 31, 2013										4,600,000