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Fair Value Measurements (Details 1) (USD $)
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9 Months Ended | 12 Months Ended | |
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Sep. 29, 2012
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Oct. 01, 2011
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Dec. 31, 2011
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| Summary of Level 3 Investments measured at fair value on recurring basis | |||
| Beginning balance | $ 2,104,000 | $ 4,141,000 | $ 4,141,000 |
| Redemption at par value | (2,125,000) | (2,100,000) | |
| Unrealized gains included in other comprehensive income | 21,000 | 63,000 | 21,000 |
| Ending balance | $ 2,104,000 | $ 2,104,000 | |
| X | ||||||||||
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- Definition
Aggregate redemption of investment at par value. No definition available.
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- Details
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- Definition
Amount of gain (loss) recognized in other comprehensive income, arising from assets measured at fair value on a recurring basis using unobservable inputs (level 3). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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