text: Although management believes that the estimated liabilities for 
  
  self-insurance are adequate, the estimates described above may  accounts receivable. While we have a large customer base that is 
  
  not be indicative of current and future losses. In addition, the  geographically dispersed, a general economic downturn in any of 
  
  actuarial calculations used to estimate self-insurance liabilities are  the industry segments in which we operate could result in higher 
  
  based on numerous assumptions, some of which are subjective.  than expected defaults, and therefore, the need to revise 
  
  We will continue to adjust our estimated liabilities for self-  estimates for bad debts. Accounts are written off against the 
  
  insurance, as deemed necessary, in the event that future loss  allowance when it becomes evident collection will not occur. 
  
  experience differs from historical loss patterns. 
  As of June 30, 2012 and 2011, our allowance for doubtful 
  
  accounts was 2.6% and 2.4% of gross receivables, respectively. 
  Pension and Other Postemployment 
  Our provision for losses on accounts receivable was $3.9 million, 
  Benefit Plans 
  $2.0 million and $2.5 million in fiscal 2012, 2011 and 2010, 