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Fair Value of Financial Instruments and Non-Financial Assets and Liabilities (Details 1) (USD $)
In Thousands, unless otherwise specified |
Sep. 29, 2012
|
Dec. 31, 2011
|
|---|---|---|
| Estimated fair value of long-term debt | ||
| Long-term debt (including current portion) | $ 640,815 | $ 612,418 |
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Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
|
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| Estimated fair value of long-term debt | ||
| Long-term debt (including current portion) | ||
|
Significant Other Observable Inputs (Level 2) [Member]
|
||
| Estimated fair value of long-term debt | ||
| Long-term debt (including current portion) | 640,815 | 612,418 |
|
Unobservable Inputs (Level 3) [Member]
|
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| Estimated fair value of long-term debt | ||
| Long-term debt (including current portion) |