Earnings (Loss) Per Share (Calculation of Basic and Diluted Earnings Per Share) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Net loss from continuing operations	$ (6,930)	$ (3,779)	$ (12,108)	$ (13,329)
Net loss	(6,930)	(3,386)	(12,108)	(12,810)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (8,532)	$ (2,734)	$ (13,313)	$ (11,560)
Weighted average common shares outstanding used to compute basic EPS	37,577	37,103	37,514	37,067
Dilutive effect of stock based awards	0	0	0	0
Weighted average common shares outstanding used to compute diluted EPS	37,577	37,103	37,514	37,067
Basic EPS from continuing operations (in dollars per share)	$ (0.18)	$ (0.10)	$ (0.32)	$ (0.36)
Diluted EPS from continuing operations (in dollars per share)	$ (0.18)	$ (0.10)	$ (0.32)	$ (0.36)