CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Net sales	$ 147,608	$ 101,331	$ 427,353	$ 281,876
Cost of sales	97,689	64,496	287,131	177,447
Gross margin	49,919	36,835	140,222	104,429
Selling and administrative expenses	27,860	20,793	79,196	65,476
Research and development expenses	5,441	4,792	17,636	14,214
Operating income	16,618	11,250	43,390	24,739
Equity income in unconsolidated joint ventures	1,290	2,373	4,041	6,348
Other income (expense), net	302	(759)	1,931	1,051
Realized investment loss, net:
Increase (decrease) in fair value of investments	(642)	563	58	1,533
Less: Portion of gains (losses) in other comprehensive income	(407)	712	261	1,800
Net realized gain (loss)	(235)	(149)	(203)	(267)
Interest income (expense), net	(1,040)	70	(3,884)	174
Income before income tax expense	16,935	12,785	45,275	32,045
Income tax expense	2,579	3,929	9,356	8,022
Net income	$ 14,356	$ 8,856	$ 35,919	$ 24,023
Net income per share:
Basic	$ 0.89	$ 0.56	$ 2.25	$ 1.52
Diluted	$ 0.85	$ 0.55	$ 2.15	$ 1.50
Shares used in computing:
Basic	16,106,054	15,816,131	15,981,337	15,790,161
Diluted	16,934,423	16,006,948	16,713,837	15,962,887