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Earnings per Common Share (Tables)
 6 Months Ended
Jun. 30, 2017
Earnings per common share:  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

Earnings per common share have been computed based on the following:

Three Months Ended Six Months Ended
June 30, June 30,
(in thousands, except for per share data)
           2017       2016       2017       2016
Net income available to common stockholders $       7,659 $       10,859 $       19,499 $       21,164
Earnings allocated to participating securities 24 - 64 64
Income attributable to common stock $ 7,683 $ 10,859 $ 19,563 $ 21,228
Weighted average common shares outstanding, including participating securities 32,008 30,129     31,991   30,082
Weighted average participating securities (102 ) (112 ) (105 ) (91 )
Weighted average common shares outstanding 31,906 30,017 31,886 29,991
Incremental shares from assumed conversions of options, performance units and restricted shares 350 355 347   340
Weighted average common and equivalent shares outstanding   32,256 30,372 32,233 30,331
 
Earnings per common share:
Basic $ 0.24 $ 0.36 $ 0.61 $ 0.71
Diluted 0.24 0.36 0.60 0.70