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Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Deferred tax assets: |  |
Inventories | $ 3,200 | $ 3,128
Employee salary and benefits | 3,860 | 3,542
Insurance | 562 | 759
Depreciation and amortization | 10,029 | 14,448
Net operating loss carryforwards | 44,057 | 44,094
General business credit carryforwards | 11,897 | 10,987
Reserves not currently deductible | 5,420 | 6,315
Gross deferred tax assets | 79,025 | 83,273
Less: Valuation allowance | (71,790) | (78,211)
Deferred tax assets less valuation allowance | 7,235 | 5,062
Deferred tax liabilities: |  |
Depreciation and amortization | (29,615) | (35,845)
Basis difference - equity investee | (31,016) | (31,016)
Other | (4,315) | (1,600)
Gross deferred tax liabilities | (64,946) | (68,461)
Net deferred tax liability | $ (57,711) | $ (63,399)

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