Share-Based Compensation - Weighted-Average Assumptions Used to Estimate the Fair Value of Each Share Option Award (Detail)	9 Months Ended
Sep. 27, 2015	Sep. 28, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Risk-free interest rate	1.80%	1.80%
Expected term	5 years 9 months 18 days	5 years 9 months 18 days
Expected volatility	57.00%	57.00%
Expected dividend yield	2.80%	3.30%

No definition available.

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- Definition

Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

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- Definition

Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

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- Definition

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

+ References

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- Definition

Risk-free interest rate assumption used in valuing an instrument.

+ References

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