Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]
Net sales	$ 855,846	$ 795,741
Cost of goods sold	727,839	684,468
Gross profit	128,007	111,273
Selling, general and administrative expenses	58,409	51,798
Rationalization charges	1,588	1,351
Income from operations	68,010	58,124
Interest and other debt expense before loss on early extinguishment of debt	18,686	15,349
Loss on early extinguishment of debt	1,474	2,068
Interest and other debt expense	20,160	17,417
Income before income taxes	47,850	40,707
Provision for income taxes	16,374	15,274
Net income	$ 31,476	$ 25,433
Earnings per share:
Basic net income per share	$ 0.50	$ 0.38
Diluted net income per share	$ 0.49	$ 0.38
Dividends per share	$ 0.15	$ 0.14
Weighted average number of shares:
Basic (in shares)	63,497	66,440
Effect of dilutive securities (in shares)	426	369
Diluted (in shares)	63,923	66,809