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Valuation and Qualifying Accounts and Reserves
 12 Months Ended
Jul. 31, 2013
Valuation and Qualifying Accounts [Abstract]  
Valuation and Qualifying Accounts and Reserves
Consolidated Financial Statement Schedule
Schedule II - Valuation and Qualifying Accounts and Reserves
(in thousands)
For the Years Ended July 31,
 
 
Balance at
Beginning of
Period
 
Charged to
Costs and
Expenses
 
Deductions
 
Balance at
End of
Period
2011
 
 
 
 
 
 
 
Inventory Reserves
$
1,452

 
$
2,389

 
$
(2,289
)
 
$
1,552

Valuation Allowance on Income Taxes
1,588

 
—

 
—

 
1,588

Trade Receivable Allowances
2,259

 
2,246

 
(1,082
)
 
3,423

2012
 
 
 
 
 
 
 
Inventory Reserves
1,552

 
1,914

 
(1,602
)
 
1,864

Valuation Allowance on Income Taxes
1,588

 
—

 
—

 
1,588

Trade Receivable Allowances
3,423

 
2,456

 
(1,326
)
 
4,553

2013
 
 
 
 
 
 
 
Inventory Reserves
1,864

 
2,203

 
(2,307
)
 
1,760

Valuation Allowance on Income Taxes
1,588

 
1,474

 
—

 
3,062

Trade Receivable Allowances
$
4,553

 
$
773

 
$
(4,848
)
 
$
478