STOCK-BASED COMPENSATION - Stock Options (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
Jun. 27, 2014
Shares (in thousands)
Outstanding at beginning of period (in shares)	74
Granted (in shares)	7
Exercised (in shares)	(42)
Expired/Forfeited (in shares)	(1)
Outstanding at end of period (in shares)	38
Weighted Average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 14.99
Granted (in dollars per share)	$ 25.26
Exercised (in dollars per share)	$ 14.98
Expired/Forfeited (in dollars per share)	$ 18.98
Outstanding at end of period (in dollars per share)	$ 16.67
Additional Information on Options Outstanding, December 27, 2013
Weighted Average Remaining Contractual Life	2 years 8 months 23 days
Aggregate Intrinsic Value (in thousands)	$ 412
Exercisable, June 27, 2014
Shares (in thousands)	38
Weighted Average Exercise Price (in dollars per share)	$ 16.67
Weighted Average Remaining Contractual Life	2 years 8 months 23 days
Aggregate Intrinsic Value (in thousands)	$ 412
Minimum \| Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Expiration Period	7 years
Maximum \| Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Expiration Period	10 years

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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