Business and Basis of Presentation (Detail) (USD $)	3 Months Ended
Mar. 31, 2015 segment	Mar. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments	3us-gaap_NumberOfReportableSegments
Acquisition and integration charges	$ 5,092,000	$ 3,356,000
Business acquisition, additional payment	$ 9,200,000

Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 4

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479

Name:	us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration