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Income Taxes - Major Jurisdictions No Longer Subject to Audit (Details)
 9 Months Ended
Sep. 30, 2017
U.S. federal  
Income Tax Examination [Line Items]  
Years No Longer Subject to Audit 2010 and prior
California (United States)  
Income Tax Examination [Line Items]  
Years No Longer Subject to Audit 2008 and prior
Canada  
Income Tax Examination [Line Items]  
Years No Longer Subject to Audit 2009 and prior
Japan  
Income Tax Examination [Line Items]  
Years No Longer Subject to Audit 2010 and prior
South Korea  
Income Tax Examination [Line Items]  
Years No Longer Subject to Audit 2011 and prior
United Kingdom  
Income Tax Examination [Line Items]  
Years No Longer Subject to Audit 2012 and prior