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.

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

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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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).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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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 difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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-Section 02

-Paragraph 29, 30

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Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Share-based Compensation (Details) (USD $)	3 Months Ended	6 Months Ended		6 Months Ended	3 Months Ended		6 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended			3 Months Ended	6 Months Ended			6 Months Ended			6 Months Ended
Share-based Compensation (Details) (USD $)	Jun. 15, 2013	Jun. 15, 2013	Jun. 15, 2013 Omnibus Plan, 2008 [Member]	Jun. 15, 2013 2009 Stock Options [Member]	Mar. 23, 2013 2012 Board of Director Stock [Member]	Mar. 24, 2012 2012 Board of Director Stock [Member]	Jun. 15, 2013 2012 Board of Director Stock [Member]	Mar. 26, 2011 2010 LTI Grant [Member]	Dec. 31, 2011 2010 LTI Grant [Member]	Jun. 15, 2013 2010 LTI Grant [Member]	Jun. 16, 2012 2010 LTI Grant [Member]	Dec. 29, 2012 2010 LTI Grant [Member]	Mar. 24, 2012 2011 LTI Grant [Member]	Jun. 15, 2013 2011 LTI Grant [Member]	Jun. 16, 2012 2011 LTI Grant [Member]	Dec. 29, 2012 2011 LTI Grant [Member]	Jun. 15, 2013 2012 Performance Grant [Member]	Jun. 16, 2012 2012 Performance Grant [Member]	Dec. 29, 2012 2012 Performance Grant [Member]	Jun. 15, 2013 2013 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock - ESPP	15,323
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized			1,902,077
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant			777,741
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized					$ 200,000					$ 200,000		$ 400,000		$ 500,000		$ 700,000			$ 100,000	$ 1,600,000
Allocated Share-based Compensation Expense		$ 445,000		$ 100,000	$ 100,000	$ 100,000				$ 200,000	$ 200,000			$ 200,000	$ 100,000		$ 100,000	$ 100,000		$ 200,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested shares outstanding at Period Start, Number of Shares		141,269
Granted, Number of Shares							18,666	92,909	12,783				59,502				10,000
Vested, Number of Shares		(69,782)		39,403			(11,493)
Nonvested shares outstanding at Period End, Number of Shares	100,153	100,153
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Nonvested shares outstanding at Period Start, Weighted Average Grant Date Fair Value Per Share		$ 17.11
Granted, Weighted Average Grant Date Fair Value Per Share		$ 15.26
Vested, Weighted Average Grant Date Fair Value Per Share (dollars per share)		$ 16.55		$ 3.24
Nonvested shares outstanding at Period End, Weighted Average Grant Date Fair Value Per Share	$ 16.97	$ 16.97