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Stock Repurchase (Details) (USD $)
 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 28, 2012
Sep. 21, 2012
Mar. 28, 2012
Dec. 31, 2011
Stock repurchase in cash $ 25,432,000 $ 3,827,000        
Stock repurchase from issued shares of series A nonconvertible 0         0
Stock Repurchase (Textual) [Abstract]            
Repurchase common stock held by promoter, one         2,485,929  
Repurchase common stock held by promoter, two         500,000  
Repurchase share price per share         $ 20  
Total consideration 59,700,000          
Non-Voting Redeemable Preferred Stock with a liquidation preference $ 1,000          
Professional and legal fees 514,000          
Redemption of outstanding shares of Series A Nonconvertible, Non-Voting Redeemable Preferred Stock       34,800,000    
Decrease in dividend obligation after redemption     870,000      
Series A Nonconvertible Non Voting Redeemable Preferred Stock [Member]
            
Stock repurchase from issued shares of series A nonconvertible 34,800          
Cash [Member]
            
Stock repurchase in cash $ 24,900,000