CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Oct. 02, 2011	Oct. 02, 2011
Net actuarial loss reclassification, deferred income tax expense	$ 3,956	$ 8,945
Net prior service credit reclassification, deferred income tax benefit	10,024	10,998
Prior service credit, deferred income tax benefit	2,015	2,015
Net actuarial gain (loss), deferred income tax expense	$ 48	$ 11