Net Earnings (Loss) Per Common Share Computation of Basic and Diluted Net Earnings (Loss) Per Common Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Basic
Average common shares outstanding	32,013	31,902
Net Earnings (loss)	$ (17,976)	$ 35,181
Net earnings (loss) per common share	$ (0.56)	$ 1.10
Income (Loss) from Continuing Operations Attributable to Parent	(17,976)	(5,708)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	40,889
Income (Loss) from Continuing Operations, Per Basic Share	$ (0.56)	$ (0.18)
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	$ 0.00	$ 1.28
Diluted
Average common shares outstanding	32,013	31,902
Shares related to convertible debt	0	0
Stock options and awards	288	32
Average common shares assuming dilution	32,301	31,934
Net Earnings (loss)	$ (17,976)	$ 35,181
Net Earnings (loss) per Share - Assuming Dilution	$ (0.56)	$ 1.10
Income (Loss) from Continuing Operations, Per Diluted Share	$ (0.56)	$ (0.18)
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	$ 0.00	$ 1.28