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Net Postretirement Benefit Cost (Detail) (POSTRETIREMENT BENEFIT PLANS, USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jul. 03, 2011	Jul. 03, 2011
POSTRETIREMENT BENEFIT PLANS
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 54	$ 108
Amortization of prior service credits	(1,227)	(2,453)
Amortization of net actuarial losses	114	228
Total	$ (1,059)	$ (2,117)

- 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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