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Stock-Based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Jan. 27, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares Paid for Tax Withholding for Share Based Compensation 32,903    
Tax withholding for share-based compensation $ 400    
Proceeds from stock option plan transactions 5,752 $ 9  
Excess Tax Benefit from Share-based Compensation, Financing Activities (190) 0  
Total intrinsic value of all options exercised $ 1,600    
Forfeiture rate 10.00%    
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation cost nonvested awards $ 3,500    
Weighted average period, unrecognized compensation cost, nonvested awards 3 years 4 months 24 days    
Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation cost nonvested restricted stock units $ 3,100    
Weighted average period, unrecognized compensation cost, nonvested awards 1 year 8 months 12 days    
The 2014 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized     2,250,000
Number of shares available for future grants 1,286,089    
The 2014 Plan | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 4 years    
Expiration period 8 years    
The Purchase Plan | The Purchase Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of continuous days of service 90 days    
Number of hours per week employed 20 hours    
Percent of market value 85.00%    
Offering period 3 months    
Employee contributions $ 300 $ 261  
Common shares issued to employees 30,564 40,950  
Shares available for future issuance 586,967    
Director | The 2014 Plan | Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 1 year    
Executives and Employees | The 2014 Plan | Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 4 years