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Exercise price per share more than voting stock.

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Rate of additional fees received based on normal compensation.

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- Definition

Share based compensation, allowable purchase rate of common stock based on annual salary.

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Purchased

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No definition available.

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- Definition

Share based compensation arrangement by share based payment number of awards granted under plan.

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- Definition

Share based compensation, common stock allowed to purchase on market value.

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- Definition

Stock Option Plans (Textual) [Abstract]

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- Definition

Costs and payments related to employee benefits and equity-based compensation, such as pension expense and contributions, other postretirement benefits expense and payments, stock or unit options expense, and amortization of restricted stock or unit.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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- Definition

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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- Definition

The noncash expense that represents the cost of restricted stock or unit distributed to employees as compensation.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

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- Definition

Discount rate from fair value on purchase date that participants pay for shares.

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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

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- Definition

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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- Definition

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

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

+ References

No definition available.

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- Definition

The weighted average of per share prices paid for shares purchased on the open market for issuance to employees under the 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

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- Definition

The number of shares or units of entity securities issued in the transaction in which equity securities were issued to pay for goods or nonemployee services.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

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- Definition

The maximum number of shares (or other type of equity) that have been approved for issuance in the equity-based payment transaction.

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

-Publisher FASB

-Name Accounting Standards Codification

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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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-Name Staff Accounting Bulletin (SAB)

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-Section D

-Subsection 2

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Purchase price of common stock expressed as a percentage of its fair value.

+ References

No definition available.

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- Definition

The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

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-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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Stock Based Compensation (Details Textual) $ / shares in Units, $ in Thousands			3 Months Ended		9 Months Ended
	Jun. 01, 2015 shares	Mar. 31, 2012 shares	Sep. 26, 2015 USD ($) Awards $ / shares shares	Sep. 27, 2014 USD ($)	Sep. 26, 2015 USD ($) $ / shares shares	Sep. 26, 2015 GBP (£) shares	Sep. 27, 2014 USD ($) shares	Dec. 27, 2014 $ / shares
Stock Option Plans (Textual) [Abstract]
Aggregate shares of restricted stock grant			0
Total unrecognized compensation \| $			$ 3,141		$ 3,141
Recognized weighted average period (in years)			1 year 15 days
Ratio for additional common stock shares issued, under ESPP					6	6
Share based Compensation Expenses \| $					$ 159		$ 138
Director Equity Plan [Member]
Stock Option Plans (Textual) [Abstract]
Shares available for issuance			35,000		35,000
Remaining number of shares to be issued			270,000		270,000
Stock option granted, shares					17,500	17,500	13,000
Fee for the chairs of each Board committee	150.00%	125.00%
Share-based Goods and Nonemployee Services Transaction, Shares Approved for Issuance	2,000
Common stock shares for each nonemployee director	250	500
Share based Compensation Expenses under Director's plan \| $					$ 617		$ 514
2006 Stock Option Plan [Member]
Stock Option Plans (Textual) [Abstract]
Shares available for issuance			1,125,000		1,125,000
Exercise price per share not less than fair value percent			110.00%
Exercise price per share more than voting stock			10.00%
Number of awards granted under 2006 plan \| Awards			0
2006 Stock Option Plan [Member] \| Maximum [Member]
Stock Option Plans (Textual) [Abstract]
Stock options maximum term (in years)			10 years
2001 Restricted Stock Plan [Member]
Stock Option Plans (Textual) [Abstract]
Restricted stock expense \| $			$ 2,159	$ 2,021
Equity Incentive Plan (2011 Plan) [Member]
Stock Option Plans (Textual) [Abstract]
Aggregate shares of restricted stock grant			1,000,000
Remaining number of shares to be issued			633,962		633,962
Employee Stock Purchase Plan [Member]
Stock Option Plans (Textual) [Abstract]
Aggregate shares of restricted stock grant					1,096,875	1,096,875
Rate of common stock at market value					85.00%	85.00%
Number of shares purchased by employees					23,607	23,607	18,373
Weighted average price \| $ / shares			$ 32.71		$ 32.71			$ 33.92
Employee Stock Purchase Plan [Member] \| Minimum [Member]
Stock Option Plans (Textual) [Abstract]
Allowable purchase rate of common stock based on annual salary					10.00%	10.00%
Employee Stock Purchase Plan [Member] \| Minimum [Member] \| United States [Member]
Stock Option Plans (Textual) [Abstract]
Shares allowed to be purchased by U.S. employees and U.K. employees \| $					$ 25
Employee Stock Purchase Plan [Member] \| Minimum [Member] \| United Kingdom [Member]
Stock Option Plans (Textual) [Abstract]
Shares allowed to be purchased by U.S. employees and U.K. employees \| £						£ 1,500
Employee Stock Purchase Plan and U.K. Plan [Member]
Stock Option Plans (Textual) [Abstract]
Remaining number of shares to be issued			629,786		629,786
Nonemployee Director Equity and Deferred Compensation Plan [Member]
Stock Option Plans (Textual) [Abstract]
Shares available for issuance			205,249		205,249