Segment Disclosure - Revenues Related to Operations by Geographic Areas (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	$ 557,204	$ 517,697	$ 1,099,247	$ 996,648
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	286,113	243,603	563,700	477,230
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	75,025	71,110	146,908	137,764
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	53,242	58,382	114,094	122,702
Asia-Pacific And Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	$ 142,824	$ 144,602	$ 274,545	$ 258,952