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Earnings per Common Share (Details) - Schedule of earnings per common share - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Earnings per common share:        
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