Stock-Based Compensation - Option Transactions (Details) (USD $) In Thousands, except Per Share data	9 Months Ended
Oct. 01, 2011
Options Outstanding [Roll Forward]
Options outstanding at the beginning of the period (shares)	28,436
Options outstanding at the beginning of the period (weighted-average exercise price per share)	$ 6.03
Options granted (shares)	5,430
Options granted (weighted-average exercise price per share)	$ 12.24
Options exercised (shares)	(2,660)
Options exercised (weighted-average exercise price per share)	$ 6.52
Options forfeited (shares)	(1,008)
Options forfeited (weighted-average exercise price per share)	$ 13.84
Options outstanding at the end of the period (shares)	30,198
Options outstanding at the end of the period (weighted-average exercise price per share)	$ 6.84

The weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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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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The combined weighted average exercise price associated with stock options during the period that have either lapsed or been forfeited.

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

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options awarded under the plan during the reporting period.

+ References

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

-Publisher FASB

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-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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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.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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

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