CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (UNAUDITED) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (UNAUDITED) [Abstract]
Sales	$ 226,760	$ 152,847	$ 421,156	$ 279,969
Cost of Sales	169,395	115,507	317,599	214,006
Gross Profit	57,365	37,340	103,557	65,963
Selling, general and administrative expenses	28,348	20,313	55,087	39,641
Operating income	29,017	17,027	48,470	26,322
Interest income	33	26	61	31
Interest expense	(63)	(120)	(233)	(271)
Other expense, net	(158)	(367)	(93)	(146)
Earnings from continuing operations before income tax provision and discontinued operations	28,829	16,566	48,205	25,936
Income tax provision	10,378	5,964	17,354	9,337
Earnings from continuing operations before discontinued operations	18,451	10,602	30,851	16,599
Loss from discontinued operations, net of tax	0	(11)	0	(16)
Net earnings	$ 18,451	$ 10,591	$ 30,851	$ 16,583
Basic earnings per share:
Earnings from continuing operations (in dollars per share)	$ 0.61	$ 0.35	$ 1.01	$ 0.56
Diluted earnings per share:
Earnings from continuing operations (in dollars per share)	$ 0.60	$ 0.35	$ 1.00	$ 0.55
Dividends per share (in dollars per share)	$ 0.125	$ 0.125	$ 0.25	$ 0.25