Earnings (Loss) Per Share - Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Class of Stock [Line Items]
Income (loss) from continuing operations	$ 67	$ (743)
Loss from discontinued operations, net of tax	0	(11,235)
Net income (loss)	$ 67	$ (11,978)
Weighted average common shares outstanding - Basic (in shares)	57,259	57,673
Assumed conversions:
Weighted average common shares outstanding - Diluted (in shares)	57,259	57,673
Basic earnings (loss) per common share:
Continuing operations (in dollars per share)	$ 0.00	$ (0.01)
Discontinued operations, net of tax (in dollars per share)	0.00	(0.19)
Basic earnings (loss) per common share (in dollars per share)	0.00	(0.20)
Diluted earnings (loss) per common share:
Continuing operations (in dollars per share)	0.00	(0.01)
Discontinued operations, net of tax (in dollars per share)	0.00	(0.19)
Diluted earnings (loss) per common share (in dollars per share)	$ 0.00	$ (0.20)
Stock Options
Assumed conversions:
Incremental common shares from stock options and restricted stock units (in shares)	0	0
Restricted Stock Units
Assumed conversions:
Incremental common shares from stock options and restricted stock units (in shares)	0	0