Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Oct. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 1,042,899	$ 1,030,594
Accumulated Amortization	705,519	666,935
Net Assets	337,380	363,659	[1]
Core/developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	595,256	584,293
Accumulated Amortization	397,645	375,395
Net Assets	197,611	208,898
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	232,001	231,908
Accumulated Amortization	121,388	115,170
Net Assets	110,613	116,738
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	165,952	165,623
Accumulated Amortization	150,172	141,763
Net Assets	15,780	23,860
Covenants not to compete
Finite-Lived Intangible Assets [Line Items]
Gross Assets	2,530	2,530
Accumulated Amortization	2,530	2,530
Net Assets	0	0
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	20,729	20,729
Accumulated Amortization	11,457	10,665
Net Assets	9,272	10,064
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	26,431	25,511
Accumulated Amortization	22,327	21,412
Net Assets	$ 4,104	$ 4,099

[1] Derived from audited financial statements.