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Description of Business and Summary of Significant Accounting Policies - Summary of Cumulative Catch-Up Adjustments (Details) (Contracts Accounted for under Percentage of Completion, USD $)
In Thousands, unless otherwise specified |
3 Months Ended | |
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Mar. 27, 2015
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Mar. 29, 2014
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Contracts Accounted for under Percentage of Completion
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| Concentration Risk [Line Items] | ||
| Favorable adjustments | $ 2,836 | $ 3,571 |
| Unfavorable adjustments | (1,773) | (791) |
| Net favorable adjustments | $ 1,063 | $ 2,780 |