Employee Benefit Plans (Details) (USD $)	3 Months Ended		6 Months Ended
	Jul. 02, 2011	Jul. 03, 2010	Jul. 02, 2011	Jul. 03, 2010	Jan. 01, 2011	Jan. 03, 2009
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 295,000	$ 264,000	$ 590,000	$ 528,000
Interest Cost	1,513,000	1,489,000	3,026,000	2,978,000
Expected Return on Plan Assets	(1,722,000)	(1,597,000)	(3,444,000)	(3,194,000)
Amortization of Prior Service Cost	22,000	28,000	44,000	56,000
Amortization of net loss	681,000	783,000	1,362,000	1,566,000
Net pension cost	789,000	967,000	1,578,000	1,934,000
Amount Company expects to contribute to its pension plans	2,300,000		2,300,000
Multi-employer plans under-funded	3		3		1
Accrued liability representing the present value of scheduled withdrawal liability payments for under-funded multi-employer plan	$ 1,100,000		$ 1,100,000		$ 1,200,000	$ 3,200,000