XML 95 R92.htm IDEA: XBRL DOCUMENT v2.4.0.8
Valuation And Qualifying Accounts (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Apr. 30, 2014
Apr. 30, 2013
Apr. 30, 2012
Allowance for Doubtful Accounts
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period $ 9,097 $ 9,437 $ 9,977
Charges to Cost and Expenses 7,840 6,748 5,732
Charges to Other Accounts 291 [1] (118) [1] (220) [1]
Deductions (7,715) [2] (6,970) [2] (6,052) [2]
Balance at End of Period 9,513 9,097 9,437
Valuation Allowance of Deferred Tax Assets
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 27,731 25,089 26,168
Charges to Cost and Expenses 3,728 5,678 443
Deductions (4,490) [2] (3,036) [2] (1,522) [2]
Balance at End of Period $ 26,969 $ 27,731 $ 25,089
[1] Exchange rate fluctuations.
[2] Allowance for doubtful accounts represents accounts written-off, net of recoveries and deferred tax asset valuation represents release of prior valuation allowances.