Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Net income.	$ 136,121	$ 123,428	$ 137,047
Pension and postretirement plans:
Prior service cost for the period			68
Net loss for the period	(16,214)	(41,117)	(6,070)
Amortization of prior service credit included in net income	(158)	(158)	(107)
Amortization of actuarial loss included in net income	2,944	1,750	1,303
Pension and postretirement plans, net of tax	(13,428)	(39,525)	(4,806)
Derivative instruments:
Net change in fair value of derivatives	(1,546)	(17,851)	27,700
Loss (gain) reclassified to net income	12,354	(20,962)	8,069
Derivative instruments, net of tax	10,808	(38,813)	35,769
Other comprehensive (loss) income, net of tax	(2,620)	(78,338)	30,963
Comprehensive income	$ 133,501	$ 45,090	$ 168,010