Consolidated Statements of Income (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
Revenues	$ 149,669	$ 111,532	$ 300,499	$ 234,981
Cost of sales	87,551	70,291	176,325	151,175
Gross profit	62,118	41,241	124,174	83,806
Selling, general and administrative expenses	15,845	12,050	30,132	25,685
Start-up costs		384		519
(Gain) loss on disposal or impairment of assets	(30)	8	1,649	11
Operating profit	46,303	28,799	92,393	57,591
Other income (expense):
Interest income, net	56	41	100	74
Foreign currency exchange (loss) gain, net	(126)	(23)	(314)	13
Other, net	(53)	(93)	(130)	(216)
Nonoperating income (expense), total	(123)	(75)	(344)	(129)
Income before income taxes	46,180	28,724	92,049	57,462
Income taxes	16,236	9,990	31,941	19,736
Net income	$ 29,944	$ 18,734	$ 60,108	$ 37,726
Earnings per share:
Basic	$ 1.29	$ 0.81	$ 2.60	$ 1.63
Diluted	$ 1.29	$ 0.81	$ 2.60	$ 1.63
Other information:
Dividends declared per common share (See Note 4)			$ 0.40	$ 0.36