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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