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Note 2 - Acquisitions (Details) - Unaudited Pro Forma Results (USD $)
In Thousands, except Per Share data, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Unaudited Pro Forma Results [Abstract]    
Revenue (less agency commissions) $ 387,365 $ 322,376
Net income $ 22,375 $ 11,790
Basic net income per share $ 0.39 $ 0.20
Diluted net income per share $ 0.38 $ 0.20