Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Aggregate number of common shares reserved for future issuance.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested options awarded to employees as compensation.

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No definition available.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of options outstanding, including both vested and non-vested options.

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STOCK-BASED EMPLOYEE COMPENSATION - Additional Information (Detail) (USD $)	6 Months Ended		3 Months Ended	6 Months Ended		6 Months Ended
	Jun. 11, 2013	Dec. 25, 2012	Jun. 11, 2013 General and administrative cost [Member]	Jun. 11, 2013 General and administrative cost [Member]	Jun. 11, 2013 2012 Plan [Member]	Jun. 11, 2013 2012 Equity Incentive Plan [Member]	Jun. 11, 2013 Minimum [Member]	Jun. 11, 2013 Maximum [Member]	Jun. 11, 2013 Maximum [Member] 2012 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted under the company's equity incentive plan, vesting period						4 years	1 year	4 years
Shares authorized for issuance					2,232,800
Shares of common stock issuable upon exercise of currently outstanding options	856,500	825,000
Shares available for future grants	1,376,300
Stock option compensation was expensed primarily in general and administrative costs			$ 238,000	$ 466,000
Total unrecognized compensation cost related to non-vested stock options	$ 3,500,000
Cost is expected to be recognized	3 years 2 months 12 days
Weighted average grant-date per share fair value of options	$ 6.99
Fair value of each option award estimated risk-free interest rate	0.99%
Fair value of each option award estimated volatility	42.31%
Fair value of each option award expected option life	6 years 3 months
Options granted under the company's equity incentive plan, contractual term									10 years