Net Income per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Net Income per Share [Abstract]
Net income	$ 7,621	$ 33,076
Less: earnings allocated to RSUs	(185)	(1,028)
Net income (loss) available to common shareholders	$ 7,436	$ 32,048
Weighted average number of common shares outstanding	30,074	29,661
Basic and diluted	$ 0.25	$ 1.08