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Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Deferred tax assets: |  |
Inventories | $ 2,156 | $ 2,108
Compensation and benefits | 4,785 | 3,902
Insurance | 245 | 281
Depreciation and amortization | 1,310 | 1,297
Net operating loss carryforwards | 28,952 | 39,846
General business credit carryforwards | 14,135 | 12,990
Other reserves | 7,609 | 5,643
Gross deferred tax assets | 59,192 | 66,067
Less: Valuation allowance | (11,125) | (59,391)
Deferred tax assets less valuation allowance | 48,067 | 6,676
Deferred tax liabilities: |  |
Depreciation and amortization | (14,911) | (13,282)
Basis difference - equity investee | (31,016) | (31,016)
Other | (1,358) | (1,074)
Gross deferred tax liabilities | (47,285) | (45,372)
Net deferred tax asset | $ 782 |
Net deferred tax (liabilities) |  | $ (38,696)

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