Derivative Financial Instruments - Summary of Outstanding Commodity Derivative Agreements (Detail) (Commodity Hedging Agreements [Member], USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 28, 2014
Commodity Hedging Agreements [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	$ 10.2
Latest Maturity	Dec. 2014

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant