Segment Reporting (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Total product revenues	$ 554,979	$ 369,588	$ 112,403
Total product revenues in percentage	100.00%	100.00%	100.00%
United States
Segment Reporting Information [Line Items]
Total product revenues	233,737	134,010	41,907
Total product revenues in percentage	42.00%	36.00%	37.00%
Germany
Segment Reporting Information [Line Items]
Total product revenues	67,132	40,833	705
Total product revenues in percentage	12.00%	11.00%	1.00%
China
Segment Reporting Information [Line Items]
Total product revenues	55,674	31,193	1,178
Total product revenues in percentage	10.00%	9.00%	1.00%
Korea
Segment Reporting Information [Line Items]
Total product revenues	42,878	37,913	18,691
Total product revenues in percentage	8.00%	10.00%	16.00%
Japan
Segment Reporting Information [Line Items]
Total product revenues	35,279	25,295	21,058
Total product revenues in percentage	6.00%	7.00%	19.00%
Canada
Segment Reporting Information [Line Items]
Total product revenues	17,582	12,305	4,246
Total product revenues in percentage	3.00%	3.00%	4.00%
Czech Republic
Segment Reporting Information [Line Items]
Total product revenues	15,361	11,722
Total product revenues in percentage	3.00%	3.00%
Mexico
Segment Reporting Information [Line Items]
Total product revenues	14,988	21,529	15,970
Total product revenues in percentage	3.00%	6.00%	14.00%
United Kingdom
Segment Reporting Information [Line Items]
Total product revenues	13,194	10,686	8,595
Total product revenues in percentage	2.00%	3.00%	8.00%
Other
Segment Reporting Information [Line Items]
Total product revenues	59,154	44,102	53
Total product revenues in percentage	11.00%	12.00%
Foreign
Segment Reporting Information [Line Items]
Total product revenues	$ 321,242	$ 235,578	$ 70,496
Total product revenues in percentage	58.00%	64.00%	63.00%