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Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Oct. 31, 2015
Oct. 31, 2014
Deferred Tax Assets, Gross [Abstract]    
Accruals and reserves $ 40,373 $ 28,608
Deferred revenue 36,460 42,766
Deferred compensation 69,716 56,920
Capitalized costs 60,998 66,616
Capitalized research and development costs 24,748 32,710
Stock compensation 18,001 18,508
Tax loss carryovers 50,987 64,273
Foreign tax credit carryovers 1,064 18,846
Research and other tax credit carryovers 80,327 110,247
Other 5,340 4,689
Gross deferred tax assets 388,014 444,183
Valuation allowance (48,700) (45,996)
Total deferred tax assets 339,314 398,187
Deferred Tax Liabilities, Gross [Abstract]    
Intangible assets 66,345 81,218
Undistributed earnings of foreign subsidiaries 933 726
Total deferred tax liabilities 67,278 81,944
Net deferred tax assets $ 272,036 $ 316,243