Earnings per Common Share (Details) - Schedule of earnings per common share - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Net income available to common stockholders									$ 60,352	$ 43,220	$ 31,060
Earnings allocated to participating securities									(139)	(141)	(147)
Income attributable to common stock									$ 60,213	$ 43,079	$ 30,913
Weighted average common shares outstanding, including participating securities									32,198	31,943	30,453
Weighted average participating securities									(74)	(41)	(54)
Weighted average common shares outstanding									32,124	31,902	30,399
Incremental shares from assumed conversions of options, performance units and restricted shares									233	335	291
Weighted average common and equivalent shares outstanding									32,357	32,237	30,690
Earnings per common share:
Basic	$ 0.58	$ 0.62	$ 0.54	$ 0.13	$ 0.33	$ 0.41	$ 0.24	$ 0.37	$ 1.87	$ 1.35	$ 1.02
Diluted	$ 0.58	$ 0.61	$ 0.54	$ 0.13	$ 0.33	$ 0.41	$ 0.24	$ 0.37	$ 1.86	$ 1.34	$ 1.01