Condensed Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Net sales	$ 792,738	$ 816,601
Cost of goods sold	678,861	694,364
Gross profit	113,877	122,237
Selling, general and administrative expenses	55,360	54,451
Rationalization charges	1,071	725
Income from operations	57,446	67,061
Interest and other debt expense	16,455	16,443
Income before taxes	40,991	50,618
Provision for income taxes	14,419	17,314
Net income	$ 26,572	$ 33,304
Earnings per share
Basic net income per share (usd per share)	$ 0.44	$ 0.53
Diluted net income per share (usd per share)	0.44	0.53
Dividends per share (usd per share)	$ 0.17	$ 0.16
Weighted average number of shares
Basic (in shares)	60,451	62,801
Effect of dilutive securities (in shares)	374	281
Diluted (in shares)	60,825	63,082