Other (Income) Expense (Components of Other Nonoperating (Income) Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Other (income) expense, net:
(Gain) loss on non-hedged swaptions	$ 0	$ 0	$ (87)
Earnings from equity investments	(209)	0	0
(Gain) loss on sale of non-operating assets	41us-gaap_NonoperatingGainsLosses	0us-gaap_NonoperatingGainsLosses	(187)us-gaap_NonoperatingGainsLosses
Miscellaneous (income) expense	14us-gaap_NonoperatingIncomeExpense	26us-gaap_NonoperatingIncomeExpense	(3)us-gaap_NonoperatingIncomeExpense
Other (income) expense, net	$ (154)us-gaap_OtherNonoperatingIncomeExpense	$ 26us-gaap_OtherNonoperatingIncomeExpense	$ (277)us-gaap_OtherNonoperatingIncomeExpense

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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The aggregate amount of gains or losses resulting from nonoperating activities (for example, interest and dividend revenue, property, plant and equipment impairment loss, and so forth).

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The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

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The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items.

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