Employee Benefit and Retirement Plans (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Pension Plans [Member]
Components of net periodic benefit cost
Interest cost	$ 9,173	$ 9,241	$ 9,987
Expected return on plan assets	(9,107)	(9,270)	(7,867)
(Gain) loss on plan assets in excess of expected return	13,202	(5,974)	(9,164)
Net actuarial (gain) loss (a)	12,801	8,869	28,733
Net cost	26,069	2,866	21,689
Postretirement Plans [Member]
Components of net periodic benefit cost
Service cost	81	86	78
Interest cost	236	258	290
Net actuarial (gain) loss (a)	9	91
Amortization of prior service cost	(237)	(166)	(166)
Amortization of loss	47	56	2
Net cost	$ 127	$ 234	$ 204