Weighted-average Useful Lives of Acquired Other Intangible Assets (Detail) (Other Identifiable Intangibles, Customer Contracts And Relationships)	1 Months Ended
Nov. 30, 2012 Air Serv	Nov. 30, 2012 HHA	Nov. 30, 2012 Calvert-Jones	Aug. 31, 2013 Blackjack	Sep. 30, 2013 BEST
Business Acquisition [Line Items]
Weighted-average amortization period for the acquired intangible assets	14 years	13 years	12 years	11 years	9 years

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

Name:	us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration