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Accounts Receivable, Net (Tables)
 12 Months Ended
Jul. 31, 2015
Accounts Receivable, Net [Abstract]  
Schedule of accounts receivable
Accounts receivable, net consisted of:
 
July 31,
(In thousands)
2015
 
2014
Advance charges receivable
$
143,724

 
$
126,307

Trade accounts receivable
73,773

 
72,170

Other receivables
1,187

 
2,092

 
218,684

 
200,569

Less: allowance for doubtful accounts
(2,988
)
 
(3,584
)
Accounts receivable, net
$
215,696

 
$
196,985
Schedule of movements in the allowance for doubtful accounts
The movements in the allowance for doubtful accounts were as follows:
 
July 31,
(In thousands)
2015
 
2014
 
2013
Balance at beginning of year
$
3,584

 
$
2,683

 
$
2,920

Charged to costs and expenses
2,221

 
3,376

 
1,424

Deductions to bad debt
(2,817
)
 
(2,475
)
 
(1,661
)
Balance at end of year
$
2,988

 
$
3,584

 
$
2,683