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Property And Equipment (Detail) (USD $)
In Thousands, unless otherwise specified
Apr. 30, 2014
Apr. 30, 2013
Apr. 30, 2012
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 192,369 $ 173,952  
Less: accumulated depreciation and amortization (131,935) (120,324)  
Property and equipment, net 60,434 [1] 53,628 [1] 49,808 [1]
Computer equipment and software
      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 113,941 [2] 98,538 [2]  
Leasehold improvements
      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 43,994 41,884  
Furniture and fixtures
      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 32,727 31,805  
Automobiles
      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 1,707 $ 1,725  
[1] As of the end of the fiscal year.
[2] Depreciation expense for capitalized software was $6.0 million, $4.0 million and $2.5 million during fiscal 2014, 2013 and 2012, respectively. The net book value of the Company's computer software costs included in property and equipment, net was $26.4 million and $19.1 million as of April 30, 2014 and 2013, respectively.