INCOME TAXES (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 30, 2012	Dec. 25, 2011
Deferred tax liabilities:
PP&E and identified intangible assets	$ 124,921	$ 125,310
Inventories	107,420	88,779
Insurance claims and losses	28,701	20,890
All other current	24,857	19,026
All other noncurrent	9,957	10,905
Total deferred tax liabilities	295,856	264,910
Deferred tax assets:
Net operating losses	244,151	251,328
Foreign net operating losses	19,113	37,932
Credit carry forwards	60,129	57,781
Allowance for doubtful accounts	5,583	6,039
Accrued liabilities	41,808	48,578
All other current	581
All other noncurrent	3,627	8,185
Derivatives		6
Workers compensation	45,320	36,318
Pension and other postretirement benefits	56,847	40,930
Total deferred tax assets	477,159	487,097
Valuation allowance	(188,354)	(230,336)
Net deferred tax assets	288,805	256,761
Net deferred tax liabilities	$ 7,051	$ 8,149