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Capitalization, Convertible Preferred Stock (Details) (USD $)
0 Months Ended9 Months Ended9 Months Ended9 Months Ended
Oct. 05, 2011
Repurchase of Equity [Member]
Sep. 30, 2011
Preferred Stock [Member]
Sep. 23, 2011
Cascade [Member]
Series A Convertible Preferred Stock [Member]
Sep. 30, 2011
Series A Convertible Preferred Stock [Member]
Sep. 23, 2011
Series A Convertible Preferred Stock [Member]
Sep. 30, 2011
Common Stock [Member]
Sep. 23, 2011
Common Stock [Member]
Class of Stock [Line Items]       
Preferred Stock, Shares Outstanding  477,800    
Convertible Preferred Stock, Shares Issued upon Conversion      4,778,000
Convertible Preferred Stock, Dicount on Price    2.00%  
Payments for Repurchase of Convertible Preferred Stock$ 73,500,000      
Stock Repurchased During Period, Value $ 100,000,000   $ (5,288,000) 
Convertible Preferred Stock, Settlement Terms   Common shares   
Preferred Stock, Liquidation Preference Per Share (dollars per share)   $ 0.10