Components of Deferred Tax Assets and (Liabilities) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 29, 2012	Dec. 31, 2011
Deferred Tax Assets And Liabilities [Line Items]
Self-insurance	$ 5,633	$ 6,183
Compensation and employee benefits	11,612	12,045
Deferred income	6,697	6,519
Loss and credit carryforwards	31,187	36,270
Equity-based compensation	12,198	12,541
Hedging	2,578	9,345
Pension	54,843	53,199
Postretirement benefits	7,805	8,407
Other	13,453	13,338
Deferred tax assets valuation allowance	(4,545)	(4,874)
Deferred tax assets	141,461	152,973
Depreciation	(88,494)	(90,174)
Intangible assets	(60,304)	(59,527)
Other	(2,671)	(2,383)
Deferred tax liabilities	(151,469)	(152,084)
Net deferred tax (liability) asset	$ (10,008)	$ 889