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Note 11 - Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Income tax at the statutory federal rate | $ 11,876 | $ 7,552 | $ 3,288
Income tax at the statutory federal rate | 34.00% | 34.00% | 34.00%
Nondeductible expenses | $ 149 | $ 154 | $ 127
Nondeductible expenses | 0.40% | 0.70% | 1.30%
State income taxes/other—net of federal benefit | $ 1,467 | $ 1,015 | $ 341
State income taxes/other—net of federal benefit | 4.20% | 4.60% | 3.60%
Total income tax expense | $ 13,492 | $ 8,721 | $ 3,756
Total income tax expense | 38.60% | 39.30% | 38.90%

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