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Restructuring - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 4,879us-gaap_RestructuringCharges	$ 4,324us-gaap_RestructuringCharges	$ 9,157us-gaap_RestructuringCharges	$ 11,163us-gaap_RestructuringCharges
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,905	1,274	4,492	7,765
Asset Write Offs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	700	97	900	97
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,078	2,335	3,027	2,683
Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	196	618	738	618
Id Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3,922	2,458	6,309	6,434
Workplace Safety [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 957	$ 1,866	$ 2,848	$ 4,729

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References+ Details