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Shareholders' Equity and Debt (Details Textual) (USD $)
0 Months Ended 1 Months Ended 3 Months Ended
May 13, 2010
Jan. 31, 2013
Apr. 29, 2012
Jan. 31, 2011
Mar. 31, 2013
Mar. 31, 2012
Shareholders' Equity (Textual) [Abstract]            
Repurchase outstanding common shares $ 10,000,000.0 $ 10,000,000 $ 10,000,000.0 $ 10,000,000.0    
Repurchase of shares, shares           319,723
Repurchase of shares, value         1,942,725 2,300,000
Restricted Stock
           
Shareholders' Equity (Textual) [Abstract]            
Restricted stock granted in period, shares         196,000  
Employee | Restricted Stock
           
Shareholders' Equity (Textual) [Abstract]            
Restricted stock awards, vesting period         4 years  
Director | Restricted Stock
           
Shareholders' Equity (Textual) [Abstract]            
Restricted stock awards, vesting period         1 year  
Common Stock
           
Shareholders' Equity (Textual) [Abstract]            
Stock Repurchased During Period, Shares         433,166  
Repurchase of shares, value         $ 1,942,725