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Share-Based Compensation (Details) (USD $)
0 Months Ended 3 Months Ended
Feb. 17, 2012
Sep. 30, 2012
Sep. 30, 2011
May 01, 2012
Share-Based Compensation [Abstract]        
Stock split, conversion ratio 2      
Stock split, distribution date       May 01, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares that may be issued pursuant to the plan (in shares)   1,000,000    
Shares available for grant under the plan (in shares)   889,000    
Share-based compensation expense   $ 368,000 $ 415,000  
Tax benefit related to share-based compensation   26,000 22,000  
Vesting period   The award shall vest in one-third increments each year beginning August 31, 2012 and annual each Augst 31 thereafter until fully vested as long as the recipients are employees throughtout each such service period    
Number of shares [Abstract]        
Granted (in shares)   39,000 36,000  
2013 Performance Shares [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense   104,000 78,000  
Grant date fair value   844,000 552,000  
Number of shares [Abstract]        
Granted (in shares)   39,000 36,000  
Unvested awards at end of period (in shares)   29,000,000 21,000,000  
2013 Stock Awards [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Grant date fair value   $ 264,000 $ 337,000  
Number of shares [Abstract]        
Granted (in shares)   12,000 22,000