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Accounts Receivable, Net (Tables)
 12 Months Ended
Jul. 31, 2019
Accounts Receivable, after Allowance for Credit Loss [Abstract]  
Schedule of accounts receivable
Accounts receivable, net consisted of:
 
 
July 31,
(In thousands)
 
2019
 
2018
Advance charges receivable
 
$
280,835

 
$
230,092

Trade accounts receivable
 
89,274

 
125,255

Other receivables
 
2,098

 
1,698

 
 
372,207

 
357,045

Less: Allowance for doubtful accounts
 
(4,942
)
 
(5,444
)
Accounts receivable, net
 
$
367,265

 
$
351,601
Schedule of movements in the allowance for doubtful accounts
The movements in the allowance for doubtful accounts were as follows:
 
 
July 31,
(In thousands)
 
2019
 
2018
 
2017
Balance at beginning of year
 
$
5,444

 
$
4,311

 
$
4,120

Charged to costs and expenses
 
2,409

 
4,255

 
2,928

Deductions to bad debt
 
(2,911
)
 
(3,122
)
 
(2,737
)
Balance at end of year
 
$
4,942

 
$
5,444

 
$
4,311