Income Taxes - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2013
Income Tax Examination [Line Items]
U.S. Federal statutory income tax rate	35.00%
United States
Income Tax Examination [Line Items]
Earliest year remaining open for audit and/or settlement in major taxing jurisdictions	2009
Canada
Income Tax Examination [Line Items]
Earliest year remaining open for audit and/or settlement in major taxing jurisdictions	2007
United Kingdom
Income Tax Examination [Line Items]
Earliest year remaining open for audit and/or settlement in major taxing jurisdictions	2011
Malaysia
Income Tax Examination [Line Items]
Earliest year remaining open for audit and/or settlement in major taxing jurisdictions	2006