Earnings per Common Share (Details) - Schedule of earnings per common share - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings per common share:
Net income available to common stockholders	$ 13,035	$ 11,812	$ 32,534	$ 33,106
Earnings allocated to participating securities	42	44	106	22
Income attributable to common stock	$ 13,077	$ 11,856	$ 32,640	$ 33,128
Weighted average common shares outstanding, including participating securities	32,015	30,143	31,999	30,094
Weighted average participating securities	(103)	(113)	(104)	(98)
Weighted average common shares outstanding	31,912	30,030	31,895	29,996
Incremental shares from assumed conversions of options, performance units and restricted shares	270	329	272	351
Weighted average common and equivalent shares outstanding	32,182	30,359	32,167	30,347
Earnings per common share:
Basic	$ 0.41	$ 0.39	$ 1.02	$ 1.1
Diluted	$ 0.41	$ 0.39	$ 1.01	$ 1.09