Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]
Net sales	$ 1,091,566	$ 928,780	$ 865,078
Cost of sales	738,170	655,653	615,331
Selling and administrative expenses	230,195	165,996	148,168
Total operating costs and expenses	968,365	821,649	763,499
Operating income	123,201	107,131	101,579
Interest expense	13,090	12,238	10,271
Other expense (income), net	2,537	2,631	333
Income from continuing operations before income taxes	107,574	92,262	90,975
Income taxes	35,253	12,432	16,020
Income from continuing operations	72,321	79,830	74,955
Income (loss) from discontinued operations, net of income taxes of $120,750, $10,831 and $10,460, respectively (Note 2)	198,206	15,419	(10,240)
Net income	$ 270,527	$ 95,249	$ 64,715
Basic:
Income from continuing operations (in dollars per share)	$ 1.34	$ 1.46	$ 1.36
Income (loss) from discontinued operations, net of income taxes (in dollars per share)	$ 3.68	$ 0.28	$ (0.19)
Net income (in dollars per share)	$ 5.02	$ 1.74	$ 1.17
Diluted:
Income from continuing operations (in dollars per share)	$ 1.31	$ 1.44	$ 1.34
Income (loss) from discontinued operations, net of income taxes (in dollars per share)	$ 3.61	$ 0.28	$ (0.18)
Net income (in dollars per share)	$ 4.92	$ 1.72	$ 1.16
Dividends	$ 0.42	$ 0.40	$ 0.34
Weighted average common shares outstanding:
Basic (in shares)	53,860,308	54,626,453	55,214,586
Diluted (in shares)	54,973,344	55,224,457	55,931,882