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Stock-Based Compensation (Narrative) (Details) - USD ($)
1 Months Ended 3 Months Ended
Sep. 09, 2014
Aug. 31, 2015
Aug. 31, 2014
Sep. 30, 2015
Sep. 30, 2014
Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted, number of shares     464,410      
Exercisable stock options       330,967 273,633  
Stock-based compensation charge       $ 726,000 $ 916,000  
Share-based compensation, number of shares exercised       323,645 688,633  
Forfeitures, Number of shares     0 0    
Deferred tax asset       $ 1,500,000   $ 1,600,000
Exercised of stock option, shares $ 572,238     $ 3,762,000    
Common stock, shares issued 336,584     47,322,702   46,679,565
Risk-free rate       1.00%  
Expected volatility       60.00%  
Period of trading days to the trigger events     30 days      
Expected volatility calculation term       250 days    
Closing price, per share     $ 19.41      
Restricted Stock [Member] | Non-employee Directors [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted, number of shares   17,955        
Restricted Stock [Member] | Employees [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted, number of shares   301,537        
Stock Options [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted, number of shares       0    
Proceeds from exercise of stock options         $ 1,000,000  
Share-based compensation, number of shares exercised         116,395  
Stock Options [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Proceeds from exercise of stock options       $ 3,800,000    
Share-based compensation, number of shares exercised       323,645    
Unrecognized compensation cost       $ 1,500,000    
Unrecognized compensation cost, expected recognition period, years       3 years    
Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted, number of shares       319,492 141,707  
Unrecognized compensation cost       $ 1,200,000    
Unrecognized compensation cost, expected recognition period, years       2 years    
Risk-free rate     1.27%      
Expected volatility     76.01%      
Expected volatility calculation term     30 days      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value       $ 1,400,000 $ 800,000  
Restricted Stock [Member] | Non-employee Directors [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted, number of shares     14,081      
Restricted Stock [Member] | Employees [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted, number of shares     127,626      
2018 Fundamental EPS [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Fundamental EPS, linear interpolation       $ 3.30    
2018 Fundamental EPS [Member] | Restricted Stock [Member] | One-Third Shares Vest [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Fundamental EPS, to be achieved       2.88    
2018 Fundamental EPS [Member] | Restricted Stock [Member] | Two-Thirds Shares Vest [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Fundamental EPS, to be achieved       3.30    
2018 Fundamental EPS [Member] | Restricted Stock [Member] | All Shares Vest [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Fundamental EPS, to be achieved       3.76    
Maximum [Member] | 2018 Fundamental EPS [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Fundamental EPS       3.76    
Minimum [Member] | 2018 Fundamental EPS [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Fundamental EPS       $ 2.88