Income Taxes - Summary of Tax Years that Remain Subject to Examination by Major Jurisdiction (Detail)	6 Months Ended
	Jun. 30, 2014
United States - Federal [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2010, 2013
Examination in progress	2011 - 2012
United States - State [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2009 - 2013
Canada [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2010 - 2013
Examination in progress	2009
Germany [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2012 - 2013
Examination in progress	2007 - 2011
France [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2010, 2013
Examination in progress	2011 - 2012
United Kingdom [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2010 - 2013
Philippines [Member]
Income Tax Examination [Line Items]
Examinations not yet initiated	2012 - 2013
Examination in progress	2011