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Equity and Capital	6 Months Ended
Equity and Capital	Jun. 30, 2011
Equity and Capital [Abstract]
Equity and Capital	Equity and Capital Common Stock of the Parent Company On March 9, 2011, the Parent Company settled its forward sale agreements dated December 4, 2009 (the "Forward Equity Offering") with J.P. Morgan and Wells Fargo Securities by delivering an aggregate 8.0 million shares of common stock. Upon physical settlement of the Forward Equity Offering, the Company received net proceeds of approximately $215.4 million. The Company used a portion of the proceeds to repay the Line, which had been drawn upon to repay unsecured notes of $161.7 million that matured in January 2011.