v2.4.0.8
Significant Contracts (Details) (USD $)
 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2011
DLA Disposition Services      
Liability for inventory included in Accrued expenses and other current liabilities $ 34,825,000 $ 36,425,000  
Profit-sharing distributions 35,944,000 43,242,000 49,318,000
Profit-sharing distributions accrued 4,315,000 4,041,000  
Surplus contract
      
DLA Disposition Services      
Number of renewal options 2    
Term of renewal options 1 year    
Usable surplus property to be purchased as a fixed percentage of DoD's original acquisition value 1.80%    
Profits from resale of the property retained (as a percent) 100.00%    
Liability for inventory included in Accrued expenses and other current liabilities 9,257,000 9,627,000  
Scrap contract
      
DLA Disposition Services      
Number of renewal options 3    
Term of renewal options 1 year    
Profits distributed to DLA Disposition Services (as a percent) 77.00%    
Performance incentive measurement period 12 months    
Amount of performance incentive earned 1,265,000 1,651,000 1,601,000
Profit-sharing distributions 35,944,000 43,242,000 49,318,000
Profit-sharing distributions accrued $ 4,315,000 $ 4,041,000 $ 7,203,000
Number of consecutive quarterly periods in which performance ratio does not exceed benchmark ratios resulting in contract termination 2    
Number of preceding months in which performance ratio does not exceed benchmark ratios resulting in contract termination 12 months    
Scrap contract | Maximum
      
DLA Disposition Services      
Additional profit sharing distribution (as a percent) 2.00%    
Revenue | U.S. Department of Defense | Surplus contract
      
DLA Disposition Services      
Concentration risk (as a percent) 27.70% 27.20% 30.30%
Revenue | U.S. Department of Defense | Scrap contract
      
DLA Disposition Services      
Concentration risk (as a percent) 13.50% 16.10% 25.50%