Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Jul. 31, 2016	Oct. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 1,066,997	$ 1,030,594
Accumulated Amortization	771,561	666,935
Net Assets	295,436	363,659	[1]
Core/developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	610,809	584,293
Accumulated Amortization	440,926	375,395
Net Assets	169,883	208,898
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	235,925	231,908
Accumulated Amortization	134,102	115,170
Net Assets	101,823	116,738
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	168,534	165,623
Accumulated Amortization	156,787	141,763
Net Assets	11,747	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	13,040	10,665
Net Assets	7,689	10,064
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	28,470	25,511
Accumulated Amortization	24,176	21,412
Net Assets	$ 4,294	$ 4,099

[1] Derived from audited financial statements.