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Income Taxes (Details 3) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012
Deferred income tax assets: |  |
Self insurance reserves | $ 8,643,000 | $ 9,439,000
Contract loss reserves | 435,000 | 49,000
Stock-based awards | 4,245,000 | 5,099,000
Bonus | 2,884,000 | 1,931,000
Other | 2,588,000 | 1,322,000
Total deferred income tax assets | 18,795,000 | 17,840,000
Deferred income tax liabilities: |  |
Property and equipment-tax over book depreciation | (24,037,000) | (22,572,000)
Intangible assets-tax over book amortization | (3,927,000) | (4,056,000)
Total deferred income tax liabilities | (27,964,000) | (26,628,000)
Net deferred income taxes | (9,169,000) | (8,788,000)
Balance sheet classification of deferred income taxes |  |
Current deferred income tax assets | 14,550,000 | 12,742,000
Non-current deferred income tax liabilities | (23,719,000) | (21,530,000)
Net deferred income taxes | (9,169,000) | (8,788,000)
Period under examination | 2 years |
Estimated reduction in unrecognized tax benefit due to the lapses in the applicable statutes of limitations and pending federal tax settlements | $ 300,000 |

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