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, 2018	Mar. 31, 2017
Earnings per common share
Net income available to common stockholders	$ 4,251	$ 11,880
Earnings allocated to participating securities	(12)	(27)
Income attributable to common stock	$ 4,239	$ 11,853
Weighted average common shares outstanding, including participating securities	32,116	31,938
Weighted average participating securities	(94)	(72)
Weighted average common shares outstanding	32,022	31,866
Incremental shares from assumed conversions of options, performance units and restricted shares	274	327
Weighted average common and equivalent shares outstanding	32,296	32,193
Earnings per common share:
Basic	$ 0.13	$ 0.37
Diluted	$ 0.13	$ 0.37