Recently Completed Acquisitions - Additional Information (Detail) (USD $)	3 Months Ended
	Nov. 30, 2012 Entity	Feb. 28, 2013	May 31, 2012	Sep. 05, 2012 Kirker Enterprises, Inc. Minimum	Sep. 21, 2012 Synta, Inc. Minimum	Nov. 30, 2012 Kirker Enterprises And Synta, Inc
Business Acquisition [Line Items]
Expected annual sales				$ 100,000,000	$ 40,000,000
Number of acquisition completed	2
Business acquisition, preliminary fair value of goodwill		1,116,967,000	849,346,000			160,900,000
Business acquisition, preliminary fair value of other intangible assets						103,300,000
Business acquisition, preliminary fair value of contingent consideration						$ 63,500,000