Condensed Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net sales	$ 1,321,342	$ 1,306,999	$ 3,441,635	$ 3,378,383
Cost of goods sold	1,113,727	1,102,892	2,884,510	2,840,991
Gross profit	207,615	204,107	557,125	537,392
Selling, general and administrative expenses	76,065	73,690	233,816	228,691
Rationalization charges	3,195	288	48,594	1,483
Other pension and postretirement income	(4,340)	(8,326)	(13,320)	(27,536)
Income before interest and income taxes	132,695	138,455	288,035	334,754
Interest and other debt expense before loss on early extinguishment of debt	26,767	28,199	82,272	88,602
Loss on early extinguishment of debt	1,676	0	1,676	2,493
Interest and other debt expense	28,443	28,199	83,948	91,095
Income before income taxes	104,252	110,256	204,087	243,659
Provision for income taxes	22,978	25,517	45,117	57,857
Net income	$ 81,274	$ 84,739	$ 158,970	$ 185,802
Earnings per share
Basic net income per share (usd per share)	$ 0.73	$ 0.77	$ 1.43	$ 1.68
Diluted net income per share (usd per share)	$ 0.73	$ 0.76	$ 1.43	$ 1.66
Weighted average number of shares
Basic (in shares)	111,058	110,657	110,985	110,599
Effect of dilutive securities (in shares)	463	1,036	554	1,010
Diluted (in shares)	111,521	111,693	111,539	111,609