Final Purchase Price and Related Allocations (Detail) (USD $) In Thousands, unless otherwise specified			1 Months Ended
	Jan. 31, 2014	Oct. 31, 2013	Nov. 30, 2012 Air Serv		Nov. 30, 2012 HHA		Nov. 30, 2012 Calvert-Jones		Aug. 31, 2013 Blackjack		Sep. 30, 2013 BEST		Oct. 31, 2013 Total	Jan. 31, 2014 Total
Purchase price:
Cash consideration			$ 162,881		$ 33,680		$ 6,055		$ 5,286		$ 2,600		$ 210,502
Fair value of contingent consideration liability											1,642		1,642
Holdback liability											400			400
Total consideration			162,881		33,680		6,055		5,286		4,642		212,544
Allocated to:
Other current and noncurrent assets			68,915		5,403		1,750		4,635		1,182			81,885
Property, plant and equipment			16,658		123		49		261		576			17,667
Other intangible assets			44,610		15,000		2,600		870		1,430			64,510
Goodwill	872,439	872,396	89,271	[1]	23,796	[1]	4,021	[1]	1,968	[1]	1,628	[1]		120,684	[1]
Total assets acquired			219,454		44,322		8,420		7,734		4,816			284,746
Liabilities assumed			(56,573)		(10,642)		(2,365)		(2,448)		(174)			(72,202)
Net assets acquired			$ 162,881		$ 33,680		$ 6,055		$ 5,286		$ 4,642			$ 212,544

[1] The total amount of goodwill that is deductible for tax purposes is $18.4 million.