Other Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Jul. 31, 2015
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Amortization of Intangible Assets	$ 2,633	$ 3,369
Intangible Assets, Amortization Expense, Next Twelve Months	8,811
Intangible Assets, Amortization Expense, Year Two	7,129
Intangible Assets, Amortization Expense, Year Three	6,451
Intangible Assets, Amortization Expense, Year Four	6,174
Intangible Assets, Amortization Expense, Year Five	5,647
Other Intangible Assets [Line Items]
Gross Carrying Amount	194,786		$ 195,569
Accumulated Amortization	(128,544)		(126,681)
Net Book Value	$ 66,242		$ 68,888
Patents [Member]
Other Intangible Assets [Line Items]
Weighted Average Amortization Period	5 years		5 years
Gross Carrying Amount	$ 12,092		$ 12,073
Accumulated Amortization	(10,760)		(10,641)
Net Book Value	$ 1,332		$ 1,432
Trademarks and other [Member]
Other Intangible Assets [Line Items]
Weighted Average Amortization Period	5 years		5 years
Gross Carrying Amount	$ 14,332		$ 14,375
Accumulated Amortization	(13,076)		(12,471)
Net Book Value	$ 1,256		$ 1,904
Customer relationships [Member]
Other Intangible Assets [Line Items]
Weighted Average Amortization Period	7 years		7 years
Gross Carrying Amount	$ 136,108		$ 136,693
Accumulated Amortization	(95,781)		(94,537)
Net Book Value	$ 40,327		$ 42,156
Non-compete agreements and other [Member]
Other Intangible Assets [Line Items]
Weighted Average Amortization Period	4 years		4 years
Gross Carrying Amount	$ 8,949		$ 9,076
Accumulated Amortization	(8,927)		(9,032)
Net Book Value	22		44
Trademarks [Member]
Other Intangible Assets [Line Items]
Gross Carrying Amount	23,305		23,352
Accumulated Amortization	0		0
Net Book Value	$ 23,305		$ 23,352