Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net sales	$ 927,565	$ 546,806	$ 2,102,100	$ 1,663,740
Cost of sales	634,550	408,443	1,581,287	1,448,083
Gross profit	293,015	138,363	520,813	215,657
Operating expenses:
Selling, general and administrative	49,861	53,542	160,218	149,828
Research and development	22,972	24,912	71,068	71,184
Production start-up	13,019	18,605	23,812	38,564
Litigation loss	0	0	6,000	0
Total operating expenses	85,852	97,059	261,098	259,576
Operating income (loss)	207,163	41,304	259,715	(43,919)
Foreign currency (loss) income, net	(1,852)	1,209	(3,549)	3,107
Interest income	2,109	11,454	15,113	39,223
Interest expense, net	(10,975)	(4,976)	(21,018)	(24,018)
Other expense, net	(3,236)	(3,399)	(8,653)	(4,328)
Income (loss) before taxes and equity in earnings	193,209	45,592	241,608	(29,935)
Income tax (expense) benefit	(38,107)	(15,035)	40,894	(25,385)
Equity in earnings, net of tax	(65)	65	150	(205)
Net income (loss)	$ 155,037	$ 30,622	$ 282,652	$ (55,525)
Net income (loss) per share:
Basic	$ 1.46	$ 0.29	$ 2.67	$ (0.53)
Diluted	$ 1.45	$ 0.29	$ 2.65	$ (0.53)
Weighted-average number of shares used in per share calculations:
Basic	105,967	105,397	105,830	105,272
Diluted	106,751	106,227	106,537	105,272