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Business Segment, Geographic Area, Product and Significant Customer Information - Company's Operations in Different Geographic Regions (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | $ 156,928 | $ 177,397 | $ 298,573 | $ 368,265 |
Long-lived assets | 80,722 |  | 80,722 |  | 82,711
United States [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 86,851 | 91,075 | 161,418 | 186,179 |
Long-lived assets | 62,404 |  | 62,404 |  | 62,203
Korea [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 16,507 | 18,625 | 30,106 | 39,181 |
Japan [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 12,589 | 19,419 | 26,418 | 52,852 |
Europe [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 18,722 | 22,474 | 37,525 | 44,459 |
Long-lived assets | 5,086 |  | 5,086 |  | 5,844
Asia (excluding Korea and Japan) [Member] |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Net revenues | 22,259 | 25,804 | 43,106 | 45,594 |
Long-lived assets | $ 13,232 |  | $ 13,232 |  | $ 14,664

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