Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans and Deferred Compensation (Details)

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Employee Benefit Plans and Deferred Compensation (Details) (USD $)
12 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2009
Employee Benefit Plans and Deferred Compensation      
Employer contribution to 401(k) plans $ 3,000,000 $ 3,200,000 $ 3,200,000
Deferred compensation plan assets, cash and cash equivalents 1,500,000    
Asset related to life insurance assets, which are held at cash surrender value 8,004,000 8,317,000  
Deferred compensation plan liabilities $ 10,400,000