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Acquisition Business Acquisition, Pro Forma Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Business Combinations [Abstract]        
Business Acquisition, Pro Forma Revenue $ 76,501 $ 77,787 $ 150,643 $ 155,046
Business Acquisition, Pro Forma Net Income (Loss) $ 3,876 $ 3,585 $ 7,091 $ 8,532
Business Acquisition, Pro Forma Earnings Per Share, Diluted $ 0.03 $ 0.03 $ 0.06 $ 0.07