Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Examination [Line Items]
Income tax benefits attributable to employee stock option transactions	$ 5,920,000	$ 8,775,000	$ 15,896,000
Increase in deferred tax asset valuation allowance	78,124,000
Undistributed earnings of subsidiaries considered indefinitely invested	6,022,000,000
Unrecognized deferred tax liability	709,000,000
Withholding tax on any monies repatriated from Canada to the U.S.	5.00%
Other recorded liabilities for interest and penalties	975,000	976,000
Income tax expense, (charges) benefits for interest and penalties	1,000	34,000	(43,000)
Expected liability to be added for uncertain taxes during next twelve months	1,000,000
Expected liability to be added for uncertain taxes during next twelve months	$ 2,000,000
Foreign Country | Minimum
Income Tax Examination [Line Items]
Foreign tax credit carryforwards expiration year	2015
Foreign Country | Maximum
Income Tax Examination [Line Items]
Foreign tax credit carryforwards expiration year	2022
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