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Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Deferred tax assets: |  |
Accruals and reserves | $ 40,944 | $ 42,436
State net operating loss carryforwards | 11,093 | 14,186
Fair value of interest rate swaps | 12,999 | 14,240
Interest and state taxes associated with the liability for uncertain income tax positions | 3,260 | 6,194
Other | 269 | 298
Total deferred tax assets | 68,565 | 77,354
Deferred tax liabilities: |  |
Basis difference in inventory | (2,055) | (1,795)
Basis difference in property and equipment | (9,993) | (16,344)
Basis difference in goodwill | (36,381) | (18,641)
Basis difference in debt |  | (7,703)
Other | (3,791) | (3,690)
Total deferred tax liability | (52,220) | (48,173)
Valuation allowance | (6,333) | (10,781)
Net deferred tax asset (liability) | $ 10,012 | $ 18,400

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