Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues and other items:
Sales	$ 263,759	$ 247,347	$ 522,470	$ 468,372
Other income (expense), net	5,857	34,735	14,089	38,022
Total revenues, net of other expenses	269,616	282,082	536,559	506,394
Costs and expenses:
Cost of goods sold	210,667	195,286	413,856	375,047
Freight	8,440	7,912	17,229	16,218
Selling, general and administrative	20,946	21,184	42,775	41,133
Research and development	4,646	5,014	8,957	9,572
Amortization of identifiable intangibles	1,025	1,652	2,054	2,893
Accrued pension and post-retirement benefits	2,578	2,632	5,156	5,264
Interest expense	1,577	1,642	3,221	2,822
Asset impairments and costs associated with exit and disposal activities, net of adjustments	468	(271)	590	293
Total	250,347	235,051	493,838	453,242
Income before income taxes	19,269	47,031	42,721	53,152
Income taxes from continuing operations	4,547	2,827	9,834	5,246
Net income	$ 14,722	$ 44,204	$ 32,887	$ 47,906
Basic
Basic	$ 0.45	$ 1.34	$ 1.00	$ 1.45
Diluted
Diluted	$ 0.44	$ 1.34	$ 1.00	$ 1.45
Shares used to compute earnings per share:
Basic	33,074	32,961	33,028	32,941
Diluted	33,108	33,051	33,048	32,999
Dividends per share	$ 0.11	$ 0.11	$ 0.220	$ 0.22