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v3.19.2

Segment Reporting (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | $ 243,326 | $ 266,400 | $ 501,247 | $ 530,986
Type of Revenue [Extensible List] | us-gaap:ProductMember | us-gaap:ProductMember | us-gaap:ProductMember | us-gaap:ProductMember
Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total product revenues in percentage | 100.00% | 100.00% | 100.00% | 100.00%
Type of Revenue [Extensible List] | us-gaap:ProductMember | us-gaap:ProductMember | us-gaap:ProductMember | us-gaap:ProductMember
United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | $ 110,632 | $ 123,512 | $ 229,086 | $ 243,862
United States | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total product revenues in percentage | 45.50% | 46.40% | 45.70% | 45.90%
Germany |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | $ 20,300 | $ 23,626 | $ 43,510 | $ 45,988
Germany | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total product revenues in percentage | 8.30% | 8.90% | 8.70% | 8.70%
Japan |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | $ 20,003 | $ 13,275 | $ 38,594 | $ 26,848
Japan | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total product revenues in percentage | 8.20% | 5.00% | 7.70% | 5.10%
China |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | $ 16,410 | $ 24,927 | $ 32,007 | $ 49,131
China | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total product revenues in percentage | 6.70% | 9.40% | 6.40% | 9.30%
South Korea |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | $ 15,577 | $ 15,783 | $ 30,555 | $ 29,605
South Korea | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total product revenues in percentage | 6.40% | 5.90% | 6.10% | 5.60%
Czech Republic |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | $ 10,009 | $ 11,106 | $ 22,151 | $ 22,821
Czech Republic | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total product revenues in percentage | 4.10% | 4.20% | 4.40% | 4.30%
Canada |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | $ 10,102 | $ 12,590 | $ 20,393 | $ 25,703
Canada | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total product revenues in percentage | 4.20% | 4.70% | 4.10% | 4.80%
United Kingdom |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | $ 6,833 | $ 8,467 | $ 15,665 | $ 19,312
United Kingdom | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total product revenues in percentage | 2.80% | 3.20% | 3.10% | 3.60%
Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | $ 33,460 | $ 33,114 | $ 69,286 | $ 67,716
Other | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total product revenues in percentage | 13.80% | 12.40% | 13.80% | 12.80%
Non U.S. |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | $ 132,694 | $ 142,888 | $ 272,161 | $ 287,124
Non U.S. | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total product revenues in percentage | 54.50% | 53.60% | 54.30% | 54.10%

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