Earnings (Loss) per Share - Computation of Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Numerator:
Net income (loss) from continuing operations	$ (11,760)	$ 3,247
Income from discontinued operations, net of income taxes	895	1,966
Net income (loss)	$ (10,865)	$ 5,213
Denominator:
Weighted average common shares outstanding - basic	92,800,392	91,905,941
Weighted average common shares outstanding - diluted	92,800,392	91,905,941
Basic earnings per share:
Net income (loss) from continuing operations	$ (0.13)	$ 0.04
Income (loss) from discontinued operations	0.01	0.02
Net income (loss)	(0.12)	0.06
Diluted earnings per share:
Net income (loss) from continuing operations	(0.13)	0.04
Income (loss) from discontinued operations	0.01	0.02
Net income (loss)	$ (0.12)	$ 0.06
Stock Options
Denominator:
Incremental shares related to share-based compensation	0	0
Nonvested Shares
Denominator:
Incremental shares related to share-based compensation	0	0