Consolidated Statements Of Operations (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jan. 01, 2012	Jan. 02, 2011	Jan. 03, 2010
Stock-based compensation expense	$ 1,037	$ 884	$ 868
Change in valuation of interest rate swap, tax	43	0	0
Postretirement benefit tax	$ 243	$ 98	$ 192

Tax effects of the increase (decrease) to accumulated comprehensive income during the period related to benefit plans. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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Total tax effect of the change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. The change includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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