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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

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