Net Earnings (Loss) Per Common Share Computation of Basic and Diluted Net Earnings (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net Earnings (Loss) per Share—Basic
Average common shares outstanding		32,465	32,175	32,484	32,144
Net loss from continuing operations		$ (5,020)	$ (7,790)	$ (25,216)	$ (23,521)
Net earnings from discontinued operations		0	0	0	260
Net Loss		$ (5,020)	$ (7,790)	$ (25,216)	$ (23,261)
Net loss per common share from continuing operations (in dollars per share)		$ (0.15)	$ (0.24)	$ (0.78)	$ (0.73)
Net earnings per common share from discontinued operations (in dollars per share)		0.00	0.00	0.00	0.01
Net earnings (loss) per common share		$ (0.15)	$ (0.24)	$ (0.78)	$ (0.72)
Net Earnings (Loss) per Share—Assuming Dilution
Average common shares outstanding		32,465	32,175	32,484	32,144
Stock options and awards		145	540	105	511
Average common shares assuming dilution		32,610	32,715	32,589	32,655
Net loss from continuing operations		$ (5,020)	$ (7,790)	$ (25,216)	$ (23,521)
Net earnings from discontinued operations		0	0	0	260
Net Loss		$ (5,020)	$ (7,790)	$ (25,216)	$ (23,261)
Net loss per common share from continuing operations (in dollars per share)	[1]	$ (0.15)	$ (0.24)	$ (0.78)	$ (0.73)
Net earnings per common share from discontinued operations (in dollars per share)		0.00	0.00	0.00	0.01
Net earnings (loss) per per common share—assuming dilution (in dollars per share)	[1]	$ (0.15)	$ (0.24)	$ (0.78)	$ (0.72)

[1] Net loss per common share assuming dilution calculated utilizing weighted average shares outstanding-basic for the periods in which there was a net loss.