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Note 7 - Retirement Plans (Detail) - Fair value by major category of plan assets: (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 25, 2011
U.S. Small/Mid Cap Equity [Member] \| Fair Value, Inputs, Level 1 [Member]
Retirement Plan Assets	$ 29,600	$ 27,919
U.S. Large Cap Equity [Member] \| Fair Value, Inputs, Level 1 [Member]
Retirement Plan Assets	42,456	38,208
U.S. Large Cap Equity [Member] \| Fair Value, Inputs, Level 2 [Member]
Retirement Plan Assets	69,810	63,108
International/Global Equity [Member] \| Fair Value, Inputs, Level 1 [Member]
Retirement Plan Assets	12,993	11,902
International/Global Equity [Member] \| Fair Value, Inputs, Level 2 [Member]
Retirement Plan Assets	44,920	39,403
Fixed Income [Member] \| Fair Value, Inputs, Level 1 [Member]
Retirement Plan Assets	69,018	65,507
Fixed Income [Member] \| Fair Value, Inputs, Level 2 [Member]
Retirement Plan Assets	$ 23,567	$ 23,391

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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