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Income Taxes Net deferred tax asset (liability) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Deferred Tax Assets [Abstract]    
Non-deductible reserves and other $ 486,990 $ 446,605
Inventory valuation reserves 953,266 1,197,271
Net operating loss carryforwards [Abstract]    
Federal 785,302 663,733
State 320,831 299,292
Alternative minimum tax credits 25,338 25,193
Energy credit and charitable contribution carryforward 38,895 38,586
Deferred Tax Assets, Gross 2,610,622 2,670,680
Deferred Tax Liabilities [Abstract]    
Capitalized items, including real estate basis differences, deducted for tax, net (84,637) (91,399)
Trademarks and tradenames (56,714) (61,692)
Deferred Tax Liabilities, Gross (141,351) (153,091)
Valuation allowance (2,469,271) (2,517,589)
Net deferred tax asset (liability) $ 0 $ 0