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Employee Benefits (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Net periodic pension cost
Service cost	$ 1,878	$ 2,091	$ 1,992
Interest cost on projected benefit obligation	4,885	4,609	4,744
Expected return on plan assets	(4,897)	(5,505)	(4,926)
Amortization of unrecognized loss	2,077	579	494
Amortization of unrecognized prior service cost
Net periodic pension cost	$ 3,943	$ 1,774	$ 2,304

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- Definition

Represents the amortization of unrecognized prior service cost.

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Defined Benefit Plan Amortization Of Unrecognized Gains Losses

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- Definition

An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

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- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments.

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The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

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