Performance Contingent TSR Shares (Detail) (Total Shareholders Return, USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
Jul. 13, 2013
Grant Date First January Twenty Thirteen
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	414
Vesting date	Mar. 01, 2015
Fair value per share	$ 17.22
Grant Date Sixteen July Two Thousand And Twelve
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	206
Vesting date	Feb. 28, 2014
Fair value per share	$ 15.45

Share Based Compensation Arrangement By Share Based Payment Award Vesting Date

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

+ Details

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