Annual report pursuant to Section 13 and 15(d)

SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) - Schedule of Valuation and Qualifying Accounts

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SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) - Schedule of Valuation and Qualifying Accounts (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Jul. 31, 2013
Jul. 31, 2012
Jul. 31, 2011
Allowance for Doubtful Accounts [Member]
     
SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) - Schedule of Valuation and Qualifying Accounts [Line Items]      
Balance at Beginning of period $ 3,273 $ 3,488 $ 2,839
Charged to costs and expenses 4,496 5,104 4,431
Deductions 5,062 [1] 5,319 [1] 3,782 [1]
Balance at end of period 2,707 3,273 3,488
Valuation Allowance of Deferred Tax Assets [Member]
     
SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) - Schedule of Valuation and Qualifying Accounts [Line Items]      
Balance at Beginning of period 41,261 32,920 28,901
Charged to costs and expenses 6,362 8,341 4,019
Balance at end of period $ 47,623 $ 41,261 $ 32,920
[1] Write-off of uncollectible accounts receivable.