Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Oct. 08, 2016	Oct. 10, 2015	Oct. 08, 2016	Oct. 10, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 40,216	$ 43,796	$ 150,734	$ 156,945
Pension and postretirement plans:
Settlement loss		1,127		3,981
Net loss for the period		(1,714)		(38,121)
Amortization of prior service cost (credit) included in net income		29	(67)	79	(223)
Amortization of actuarial loss included in net income		1,273	624	2,939	2,080
Pension and postretirement plans, net of tax		715	557	(31,122)	1,857
Derivative instruments:
Net change in fair value of derivatives	[1]	3,433	(2,652)	2,496	(1,262)
Loss reclassified to net income		742	1,096	2,688	3,934
Derivative instruments, net of tax		4,175	(1,556)	5,184	2,672
Other comprehensive income (loss), net of tax		4,890	(999)	(25,938)	4,529
Comprehensive income		$ 45,106	$ 42,797	$ 124,796	$ 161,474

[1] Amounts in parentheses indicate debits to determine net income.