CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Parenthetical) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2011	Oct. 03, 2010	Oct. 02, 2011	Oct. 03, 2010
Net actuarial loss reclassification, deferred income tax benefit	$ (3,956)	$ (1,903)	$ (8,945)	$ (5,706)
Net prior service credit reclassification, deferred income tax expense	10,024	398	10,998	1,193
Prior service credit, deferred income tax benefit	(2,015)		(2,015)
Net actuarial gains, deferred income tax expense	$ 48		$ 11