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Summary of Major Jurisdictions and Tax Year Subject to Examination Tax Authorities (Detail) | 12 Months Ended
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Dec. 31, 2014
Taiwan |
Income Tax Examination [Line Items] |
Years Subject to Income Tax Examination | 2009 and onward
FCI |
Income Tax Examination [Line Items] |
Years Subject to Income Tax Examination | 2009 and onward
United States |
Income Tax Examination [Line Items] |
Years Subject to Income Tax Examination | 2007 onward

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