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Subsequent Events (Details) (USD $)
0 Months Ended 9 Months Ended
Oct. 26, 2012
Sep. 30, 2012
Dividends payable, date declared   Oct. 26, 2012
Common stock, dividends declared $ 0.05  
Dividends payable, date to be paid   Nov. 20, 2012
Dividends payable, date of record   Nov. 09, 2012
Series A [Member]
   
Cumulative redeemable preferred stock, dividends declared $ 0.5546875  
Preferred Stock, Dividend Rate, Percentage   8.875%
Series B [Member]
   
Cumulative redeemable preferred stock, dividends declared $ 0.453125  
Preferred Stock, Dividend Rate, Percentage   7.25%