Final Purchase Price and Related Allocations (Detail) (USD $) In Thousands, unless otherwise specified				1 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011	Nov. 30, 2012 Air Serv		Nov. 30, 2012 HHA		Nov. 30, 2012 Calvert-Jones		Aug. 31, 2013 Blackjack		Sep. 30, 2013 BEST		May 31, 2012 TEGG	Dec. 01, 2010 The Linc Group LLC	Oct. 31, 2013 Total
Purchase price:
Cash consideration				$ 162,881		$ 33,680		$ 6,055		$ 5,286		$ 2,600		$ 5,667	$ 298,720	$ 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		5,500	298,700	212,544
Allocated to:
Other current and noncurrent assets				68,915		5,403		1,750		4,635		1,565		3,408	139,720	82,268
Property, plant and equipment				16,658		123		49		261		490			9,462	17,581
Other intangible assets				44,610		15,000		2,600		870		1,430		2,200	87,000	64,510
Goodwill	872,396	751,610	750,872	89,271	[1]	23,796	[1]	4,021	[1]	1,968	[1]	1,607	[1]	1,988	154,487	120,663	[1]
Total assets acquired				219,454		44,322		8,420		7,734		5,092		7,596	390,669	285,022
Liabilities assumed				(56,573)		(10,642)		(2,365)		(2,448)		(450)		(1,929)	(91,949)	(72,478)
Net assets acquired				$ 162,881		$ 33,680		$ 6,055		$ 5,286		$ 4,642		$ 5,667	$ 298,720	$ 212,544

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