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Pension Plans (Details) (USD $) In Thousands, unless otherwise specified | 9 Months Ended | 1 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 27, 2014 | Sep. 28, 2013 | Jun. 30, 2012 Multi-employer defined benefit pension plan | Sep. 27, 2014 Multi-employer defined benefit pension plan
Pension Plans |  |  |  |
Percentage of compounded annual surcharge each year |  |  |  | 5.00%
Percentage of interim surcharge |  |  | 5.00% |
Estimated liability upon withdrawal from plan in current year |  |  |  | $ 37,200
Pension plans |  |  |  |
Pension expense | $ 2,028 | $ 1,758 |  |

X
- Definition Amount of the obligation recognized by withdrawing from a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References No definition available. + Details
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- Definition Represents employer payable additional surcharge to the pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References No definition available. + Details
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- Definition Represents employer payable surcharge to the pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References No definition available. + Details
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- Details
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 + Details
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- Details
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