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Income Taxes - Summary of Tax Years that Remain Subject to Examination by Major Jurisdiction (Detail)	6 Months Ended
	Jun. 30, 2015
United States - Federal [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2013 - 2014
Examination in progress	N/A
United States - State [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2010 - 2014
Examination in progress	N/A
Canada [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2010 - 2014
Examination in progress	N/A
Germany [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2012 - 2014
Examination in progress	2007 - 2011
France [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2013 - 2014
Examination in progress	2011 - 2012
United Kingdom [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2013 - 2014
Examination in progress	N/A
Philippines [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2012, 2014
Examination in progress	2011, 2013

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Income tax examination in progress.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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