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Fair Value Measurement (Tables) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 25, 2011 | Dec. 31, 2010
Fair Value Measurement [Abstract] |  |
Financial Assets And Liabilities Carried At Fair Value Measured On A Recurring Basis |
|  | Total carrying value at September 25, 2011 |  |  | Quoted prices in active markets (Level 1) |  |  | Significant other observable inputs (Level 2) |  |  | Significant unobservable inputs (Level 3) |
|  | (Dollars in thousands) |
Cash and cash equivalents |  | $ | 45,004 |  |  | $ | 45,004 |  |  | $ | — |  |  | $ | — |
Investments in marketable securities |  |  | 3,762 |  |  |  | 3,762 |  |  |  | — |  |  |  | — |
Bonds – foreign government |  |  | 4,976 |  |  |  | — |  |  |  | 4,976 |  |  |  | — |
Derivative assets |  |  | 66 |  |  |  | — |  |  |  | 66 |  |  |  | — |
Derivative liabilities |  |  | 15,566 |  |  |  | — |  |  |  | 15,566 |  |  |  | — |
Contingent consideration liabilities |  |  | 9,566 |  |  |  | — |  |  |  | — |  |  |  | 9,566 |
|  | Total carrying value at December 31, 2010 |  |  | Quoted prices in active markets (Level 1) |  |  | Significant other observable inputs (Level 2) |  |  | Significant unobservable inputs (Level 3) |
|  | (Dollars in thousands) |
Investments in marketable securities |  | $ | 4,108 |  |  | $ | 4,108 |  |  | $ | — |  |  | $ | — |
Derivative assets |  |  | 880 |  |  |  | — |  |  |  | 880 |  |  |  | — |
Derivative liabilities |  |  | 25,200 |  |  |  | — |  |  |  | 25,200 |  |  |  | — |
Reconciliation Of Changes In Financial Liabilities |
|  | Contingent consideration |
|  | (Dollars in thousands) |
Balance at beginning of year |  | $ | — |
Initial estimate of contingent consideration |  |  | 15,400 |
Payment |  |  | (6,000 | )
Revaluations |  |  | 166 |
Balance at end of period |  | $ | 9,566 |

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- Definition Fair value measurement. + Details
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- Definition Schedule Of Information Regarding Changes In Financial Liabilities + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 820 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19190-110258 + Details
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