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Allowance For Doubtful Accounts For Trade Accounts Receivable (Tables)
 12 Months Ended
Oct. 31, 2013
Allowance For Doubtful Accounts For Trade Accounts Receivable [Abstract]  
Summary Of Changes In The Allowance For Doubtful Accounts For Trade Accounts Receivable
A summary of changes in the allowance for doubtful accounts for trade accounts receivable for the years ended October 31, 2013, 2012 and 2011 follows:
 
 
Years ended October 31,
 
2013
 
2012
 
2011
Balance at beginning of year
$
92,148

 
$
145,616

 
$
120,450

Bad debt expense (recovery)
20,461

 
(10,327
)
 
40,231

Losses charged to allowance
(38,922
)
 
(43,141
)
 
(15,065
)
Recoveries added to allowance
386

 
—

 
—

Balance at end of year
$
74,073

 
$
92,148

 
$
145,616