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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
Mar. 31, 2017
Mar. 31, 2016
Earnings Per Share [Abstract]    
Net income available to common stockholders $ 11,880 $ 10,369
Earnings allocated to participating securities 27 22
Income attributable to common stock $ 11,853 $ 10,347
Weighted average common shares outstanding, including participating securities 31,938 30,020
Weighted average participating securities (72) (63)
Weighted average common shares outstanding 31,866 29,957
Incremental shares from assumed conversions of options, performance units and restricted shares 327 289
Weighted average common and equivalent shares outstanding 32,193 30,246
Earnings per common share:    
Basic $ 0.37 $ 0.35
Diluted $ 0.37 $ 0.34