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Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax Disclosure [Abstract] |  |  |
Current federal tax | $ (3,923) | $ (3,632) | $ (2,714)
Current state and local tax | (2,304) | (2,055) | (1,502)
Total current tax | (6,227) | (5,687) | (4,216)
Deferred federal tax | (446) | (291) | 169
Deferred state and local tax | 0 | (168) | 98
Total deferred tax | (446) | (459) | 267
Income tax expense | $ (6,673) | $ (6,146) | $ (3,949)
Effective income tax rate, percent | 48.50% | 44.80% | 44.70%
Federal tax expense at 34% statutory rate | $ (4,684) | $ (4,629) | $ (3,003)
State income taxes, net of federal benefit | (1,543) | (1,517) | (946)
Corporate income tax rate adjustment | $ (446) | $ 0 | $ 0
Federal statutory income tax rate | 34.00% | 34.00% | 34.00%
Increase in income tax expense | $ 400 |  |
Deferred assets decrease | $ 400 |  |

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