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		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net Earnings (Loss) per Share—Basic
Average common shares outstanding		32,131	32,017	32,128	32,015
Net loss from continuing operations		$ (8,217)	$ (14,455)	$ (15,731)	$ (33,350)
Net earnings from discontinued operations		0	843	260	1,762
Net Loss		$ (8,217)	$ (13,612)	$ (15,471)	$ (31,588)
Net loss per common share from continuing operations (in dollars per share)		$ (0.26)	$ (0.45)	$ (0.49)	$ (1.04)
Net earnings per common share from discontinued operations (in dollars per share)		0.00	0.03	0.01	0.06
Net earnings (loss) per common share		$ (0.26)	$ (0.43)	$ (0.48)	$ (0.99)
Net Earnings (Loss) per Share—Assuming Dilution
Average common shares outstanding		32,131	32,017	32,128	32,015
Stock options and awards		757	199	518	229
Average common shares assuming dilution		32,888	32,216	32,646	32,244
Net loss from continuing operations		$ (8,217)	$ (14,455)	$ (15,731)	$ (33,350)
Net earnings from discontinued operations		0	843	260	1,762
Net Loss		$ (8,217)	$ (13,612)	$ (15,471)	$ (31,588)
Net loss per common share from continuing operations (in dollars per share)	[1]	$ (0.26)	$ (0.45)	$ (0.49)	$ (1.04)
Net earnings per common share from discontinued operations (in dollars per share)		0.00	0.03	0.01	0.05
Net earnings (loss) per per common share—assuming dilution (in dollars per share)	[1]	$ (0.26)	$ (0.43)	$ (0.48)	$ (0.99)

[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.