Annual report pursuant to Section 13 and 15(d)

Components of Deferred Tax Assets and Liabilities (Detail)

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Components of Deferred Tax Assets and Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Apr. 30, 2013
Apr. 30, 2012
Income Taxes [Line Items]    
Deferred compensation $ 64,791 $ 63,133
Loss and credit carryforwards 42,984 33,355
Allowance for doubtful accounts 1,804 1,388
Deferred rent 6,366 6,901
Deferred revenue 1,646  
Reserves and accruals 7,613 3,773
Other 4,556 4,284
Gross deferred tax assets 129,760 112,834
Intangibles (21,560) (11,103)
Property and equipment (6,747) (4,527)
Prepaid expenses (4,184)  
Other (2,824) (3,995)
Gross deferred tax liabilities (35,315) (19,625)
Valuation allowances (27,731) (25,089)
Net deferred tax asset $ 66,714 $ 68,120