Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Gross Sales	$ 267,294	$ 247,121	$ 789,765	$ 715,494
Revenues and other items:
Other income (expense), net	(2,557)	34	11,532	38,055
Total revenues, net of other expenses	264,737	247,155	801,297	753,549
Costs and expenses:
Selling, general and administrative	20,676	20,718	63,452	61,852
Research and development	5,150	4,455	14,107	14,028
Amortization of identifiable intangibles	1,022	1,658	3,076	4,550
Accrued pension and post-retirement benefits	2,653	2,381	7,809	7,645
Interest expense	1,318	1,757	4,539	4,579
Asset impairments and costs associated with exit and disposal activities, net of adjustments	1,209	361	1,799	653
Goodwill, Impairment Loss	46,792	0	46,792	0
Total	305,636	234,459	799,476	687,702
Income (loss) before income taxes	(40,899)	12,696	1,821	65,847
Income taxes from continuing operations	(6,699)	4,422	3,135	9,667
Net income (loss)	$ (34,200)	$ 8,274	$ (1,314)	$ 56,180
Basic
Basic	$ (1.03)	$ 0.25	$ (0.04)	$ 1.71
Diluted
Diluted	$ (1.03)	$ 0.25	$ (0.04)	$ 1.70
Shares used to compute earnings per share:
Basic	33,110	32,954	33,056	32,945
Diluted	33,110	32,954	33,056	32,952
Dividends per share	$ 0.11	$ 0.11	$ 0.33	$ 0.33
Product [Member]
Costs and expenses:
Freight	$ 217,378	$ 194,508	$ 631,235	$ 569,555
Shipping and Handling [Member]
Costs and expenses:
Freight	$ 9,438	$ 8,621	$ 26,667	$ 24,840