Cost Saving Initiatives - Schedule of Expenses and Cumulative Expenses Associated With Implementation of Cost Saving Initiatives (Parenthetical) (Detail) (Cumulative [Member])	9 Months Ended
Sep. 30, 2014
Cumulative [Member]
Restructuring and Related Cost [Abstract]
Cost Saving Initiative date	Oct. 01, 2012

Date the restructuring activities were initiated or are expected to be initiated, in CCYY-MM-DD format.

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Name:	us-gaap_RestructuringAndRelatedActivitiesInitiationDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration