Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues	$ 153,744	$ 177,614	$ 301,402	$ 340,780
Cost of sales	114,411	113,361	219,684	213,063
Gross profit	39,333	64,253	81,718	127,717
Selling, general, and administrative, and other operating expenses	15,457	17,003	32,451	33,722
Operating profit	23,876	47,250	49,267	93,995
Other income (expense):
Interest income (expense), net	242	9	427	(35)
Foreign currency exchange (loss) gain, net	(19)	579	(31)	144
Other, net	(11)	47	(71)	(212)
Nonoperating expense, total	212	635	325	(103)
Income before income taxes	24,088	47,885	49,592	93,892
Income taxes	7,781	15,968	15,709	31,684
Net income	$ 16,307	$ 31,917	$ 33,883	$ 62,208
Earnings per share:
Basic	$ 0.71	$ 1.38	$ 1.47	$ 2.69
Diluted	$ 0.71	$ 1.38	$ 1.47	$ 2.69
Other information:
Dividends declared per common share (See Note 4)			$ 0.54	$ 0.48