CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY
Preferred stock, dividend rate (as a percent)	8.50%	8.50%
Preferred Stock, Series A 8.50% Cumulative Redeemable - Liquidation Preference per Share	$ 25.00	$ 25.00
Common Stock, Par Value	$ 0.01	$ 0.01