Divestitures (Income (Loss) from Divestitures) (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]
Net sales						$ 5,952	$ 103,392
Operating income						920	16,423
Interest expense and other income (expense)						10	(9)
Tax provision						(365)	(6,479)
Income from discontinued operations, net of tax	$ (762)	$ 195	$ (147)	$ 90,086	$ 0	565	9,935
Gain on disposal of assets						93,859	71
Tax provision						(5,052)	(29)
Gain on disposal of assets, net of tax					0	88,807	42
Net income from discontinued operations					$ 0	$ 89,372	$ 9,977