Acquisitions - Additional Information (Detail) (USD $)	9 Months Ended	3 Months Ended	9 Months Ended			9 Months Ended	3 Months Ended	9 Months Ended		9 Months Ended	3 Months Ended	9 Months Ended		9 Months Ended
	Jul. 31, 2013	Jul. 31, 2013 Air Serv	Jul. 31, 2013 Air Serv	Apr. 30, 2013 Air Serv	Nov. 30, 2012 Air Serv	Jul. 31, 2013 Air Serv Other Identifiable Intangibles Customer Contracts And Relationships	Jul. 31, 2013 HHA	Jul. 31, 2013 HHA	Nov. 30, 2012 HHA	Jul. 31, 2013 HHA Other Identifiable Intangibles Customer Contracts And Relationships	Jul. 31, 2013 Calvert-Jones	Jul. 31, 2013 Calvert-Jones	Nov. 30, 2012 Calvert-Jones	Jul. 31, 2013 Calvert-Jones Other Identifiable Intangibles Customer Contracts And Relationships	Oct. 31, 2012 TEGG	May 31, 2012 TEGG
Business Acquisition [Line Items]
Business acquisition aggregate purchase price					$ 162,881,000				$ 33,680,000				$ 6,250,000			$ 5,500,000
Business acquisition working capital adjustment				(4,100,000)			600,000	600,000							100,000
Business acquisition indemnification hold back amount					11,900,000		1,400,000	1,400,000					700,000			500,000
Revenues from acquired business		86,800,000	250,600,000				13,600,000	39,500,000			5,300,000	13,700,000
Operating profit from acquired business		3,800,000	8,700,000				700,000	1,000,000			600,000	500,000
Weighted-average amortization period for the acquired intangible assets						15 years				13 years				12 years
Fair value of accounts receivables acquired					53,100,000
Uncollectable receivable amount					400,000
Life to date business acquisition entity transaction cost	1,200,000
Direct acquisition costs	$ 300,000