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Business Segment, Geographic Area, Product and Significant Customer Information - Company Long-Lived Assets in Different Geographic Regions (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Net revenues $ 204,394 $ 166,453 $ 156,928 $ 141,645 $ 133,796 $ 141,447 $ 177,397 $ 190,868 $ 669,420 $ 643,508 $ 822,517
Long-lived assets 79,659       82,711       79,659 82,711  
United States [Member]
                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Net revenues                 363,948 326,894 391,122
Long-lived assets 60,700       62,203       60,700 62,203  
Korea [Member]
                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Net revenues                 75,401 64,541 29,193
Japan [Member]
                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Net revenues                 56,978 81,883 106,003
Europe [Member]
                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Net revenues                 77,910 85,362 115,362
Long-lived assets 5,484       5,844       5,484 5,844  
Asia (excluding Korea and Japan) [Member]
                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Net revenues                 95,183 84,828 180,837
Long-lived assets $ 13,475       $ 14,664       $ 13,475 $ 14,664