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Fair Value Measurements (Tables)
6 Months Ended
Jan. 31, 2018
Text Block [Abstract]  
Financial Assets and Liabilities Accounted for at Fair Value on a Recurring Basis
 
Inputs
Considered As
 
 
 
 
 
Quoted Prices in Active Markets for Identical
Assets (Level 1)
 
Significant Other Observable Inputs (Level 2)
 
Fair Values
 
Balance Sheet Classifications
January 31, 2018
 
 
 
 
 
 
 
Trading securities
$
14,726

 
$

 
$
14,726

 
Other assets
Foreign exchange contracts

 
379

 
379

 
Prepaid expenses and other current assets
Total Assets
$
14,726

 
$
379

 
$
15,105

 
 
Foreign exchange contracts
$

 
$
1,054

 
$
1,054

 
Other current liabilities
Total Liabilities
$

 
$
1,054

 
$
1,054

 
 
July 31, 2017
 
 
 
 
 
 
 
Trading securities
$
13,994

 
$

 
$
13,994

 
Other assets
Foreign exchange contracts

 
1,354

 
1,354

 
Prepaid expenses and other current assets
Total Assets
$
13,994

 
$
1,354

 
$
15,348

 
 
Foreign exchange contracts
$

 
$
1,577

 
$
1,577

 
Other current liabilities
Total Liabilities
$

 
$
1,577

 
$
1,577