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, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings per common share:
Income attributable to common stock	$ 19,860	$ 13,035	$ 41,582	$ 32,534
Earnings allocated to participating securities	42	42	98	106
Net income	$ 19,902	$ 13,077	$ 41,680	$ 32,640
Weighted average common shares outstanding, including participating securities	32,167	32,015	32,127	31,999
Weighted average participating securities	(25)	(103)	(34)	(104)
Weighted average common shares outstanding	32,142	31,912	32,093	31,895
Incremental shares from assumed conversions of options, performance units and restricted shares	177	270	220	272
Weighted average common and equivalent shares outstanding	32,319	32,182	32,313	32,167
Earnings per common share:
Basic	$ 0.62	$ 0.41	$ 1.3	$ 1.02
Diluted	$ 0.61	$ 0.41	$ 1.29	$ 1.01