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	$ 422,798	$ 361,457
Cost of sales	314,357	285,054
Gross profit	108,441	76,403
Selling, general and administrative expenses	52,713	44,565
Operating profit	55,728	31,838
Interest expense, net	476	189
Income before income taxes	55,252	31,649
Provision for income taxes	19,293	11,576
Net income	$ 35,959	$ 20,073
Net income per common share:
Basic (in usd per share)	$ 1.46	$ 0.83
Diluted (in usd per share)	$ 1.45	$ 0.82
Weighted average common shares outstanding:
Basic (in shares)	24,567	24,215
Diluted (in shares)	24,794	24,541