Allocation of Estimated Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Jul. 31, 2015	Jan. 31, 2015	Oct. 31, 2014
Business Acquisition [Line Items]
Goodwill	$ 1,040,443		$ 1,071,786
Belgium-based | Barco N V
Business Acquisition [Line Items]
Current assets		$ 94,899
Property, plant and equipment		6,211
Goodwill		48,001
Other assets		3,401
Total assets acquired		209,928
Current liabilities assumed		33,492
Long-term liabilities assumed		5,366
Net assets acquired		171,070
Belgium-based | Programs | Barco N V
Business Acquisition [Line Items]
Intangible assets subject to amortization		56,513
Belgium-based | Programs Two | Barco N V
Business Acquisition [Line Items]
Intangible assets subject to amortization		677
Belgium-based | Trade Name | Barco N V
Business Acquisition [Line Items]
Intangible assets subject to amortization		$ 226