Stock-Based Compensation (Details 1) (USD $)	0 Months Ended	12 Months Ended
Nov. 21, 2011	Dec. 29, 2012	Dec. 31, 2011
Activity of stock option plans including options and RSUs [Roll Forward]
Beginning balance		2,348,162
Options granted		(281,085)
Ending balance		2,020,319
Stock Options and Restricted Stock Units [Member]
Activity of stock option plans including options and RSUs [Roll Forward]
Beginning balance		1,391,930
Options granted		281,085
Options cancelled		(139,376)
RSUs granted		103,554
RSUs cancelled		0
Plan shares expired		53,102
Ending balance		1,093,565
Activity for RSUs [Roll Forward]
Number of RSU, Granted		103,554
Number of RSU, Cancelled		0
Restricted Stock Units (RSUs) [Member]
Activity of stock option plans including options and RSUs [Roll Forward]
RSUs granted	(286,180)	(51,777)	(315,472)
RSUs cancelled		0
Activity for RSUs [Roll Forward]
Number of RSU, Beginng balance		300,058
Number of RSU, Granted	(286,180)	(51,777)	(315,472)
Number of RSU, Released		(116,673)
Number of RSU, Cancelled		0
Number of RSU, Ending balance		235,162	300,058
Weighted Average Fair Value, Beginng balance		$ 15.30
Weighted Average Fair Value, Granted		$ 17.79
Weighted Average Fair Value, Released		$ 14.88
Weighted Average Fair Value, Cancelled		$ 0.00
Weighted Average Fair Value, Ending balance		$ 16.32	$ 15.30

Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Expired In Period

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Released in Period, Weighted Average Grant Date Fair Value

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options and Equity Instruments Other Than Options, Released In Period

+ References

No definition available.

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- Definition

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

+ References

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

+ Details

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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 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).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

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-Publisher FASB

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-Paragraph A240

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- Definition

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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(i)-(ii)

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-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph A240

-Subparagraph b(2)(b)

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(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.

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- Definition

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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(i)-(ii)

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-Publisher FASB

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(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.

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- Definition

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.

+ References

+ Details

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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 number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(b)

-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.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

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-Subparagraph (c)(1)(i)-(ii)

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