Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Detail) - Aluminum Forward Contracts [Member] - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jul. 04, 2015	Jul. 04, 2015
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive loss	$ 71	$ 126
Tax effect	(28)	(50)
Reversal of income tax allocation	1,595	1,595
Net current-period other comprehensive income	1,638	1,671
Accumulated Other Comprehensive Loss [Member]
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (1,638)	$ (1,671)

Other comprehensive income loss reclassification adjustment from AOCI on derivatives reversal of income tax allocation.

No definition available.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

+ References

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Amount of tax expense (benefit) allocated to other comprehensive income (loss) attributable to parent entity.

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Amount before tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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