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Note 2 - Unaudited Pro Forma Results (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Hoak and SJL [Member] |  |  |
Revenue (less agency commissions) |  | $ 565,251 | $ 445,443
Net income |  | $ 50,771 | $ 20,665
Basic net income per share (in dollars per share) |  | $ 0.88 | $ 0.36
Diluted net income per share (in dollars per share) |  | $ 0.87 | $ 0.36
Revenue (less agency commissions) | $ 621,530 | $ 559,538 |
Net income | $ 46,181 | $ 59,342 |
Basic net income per share (in dollars per share) | $ 0.68 | $ 1.03 |
Diluted net income per share (in dollars per share) | $ 0.67 | $ 1.02 |

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