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Stockholders' Equity and Stock-Based Compensation (Details) (USD $)	1 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 31, 2010	Dec. 29, 2012	Dec. 31, 2001 2001 Equity Plan	Dec. 29, 2012 2001 Equity Plan	Dec. 31, 2001 2001 Supplemental Equity Plan	Dec. 29, 2012 2010 Equity Plan	Dec. 29, 2012 2010 Equity Plan Stock options	Dec. 29, 2012 2010 Equity Plan Stock options Minimum
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Authorized stock repurchase amount	$ 15,000,000
Number of shares repurchased since inception		2,065,534
Value of shares repurchased since inception		$ 7,870,155
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized			7,100,000		1,300,000	1,800,000
Life of award			10 years		10 years		10 years
Number of shares that may be issued				0	0	2,100,000
Purchase price of common stock under equity plans as percent of fair value at the grant date							110.00%	100.00%

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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).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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

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The amount authorized by an entity's Board of Directors under a stock repurchase plan.

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