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Business Segment, Geographic Area, Product and Significant Customer Information - Schedule of Net Revenues and Long-Lived Assets by Geographic Regions (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
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Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Net revenues | $ 213,839 us-gaap_SalesRevenueNet | $ 206,353 us-gaap_SalesRevenueNet |
Long-lived assets | 73,030 us-gaap_NoncurrentAssets |  | 74,687 us-gaap_NoncurrentAssets
United States [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Net revenues | 120,181 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US | 117,377 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US |
Long-lived assets | 57,337 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US |  | 57,701 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US
Korea [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Net revenues | 32,072 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_KR | 27,591 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_KR |
Japan [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Net revenues | 17,256 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_JP | 16,928 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_JP |
Asia (Excluding Korea and Japan) [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Net revenues | 23,683 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember | 24,902 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember |
Long-lived assets | 10,162 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember |  | 10,887 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember
Europe [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Net revenues | 20,647 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember | 19,555 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember |
Long-lived assets | $ 5,531 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember |  | $ 6,099 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember

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