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Income Taxes (Details 3) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Deferred income tax assets: |  |
Self insurance reserves | $ 7,464 | $ 8,369
Contract loss reserves | 240 | 72
Stock-based awards | 3,986 | 4,420
Bonus | 2,497 | 2,578
Other | 960 | 886
Total deferred income tax assets | 15,147 | 16,325
Deferred income tax liabilities: |  |
Property and equipment - tax over book depreciation | (25,859) | (25,350)
Intangible assets - tax over book amortization | (3,670) | (3,799)
Total deferred income tax liabilities | (29,529) | (29,149)
Net deferred income taxes | $ (14,382) | $ (12,824)

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