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Income Taxes - Summary of Income Tax Rate (Detail)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Tax Disclosure [Abstract]      
Canadian statutory income tax rate 26.50% 26.50% 28.30%
Manufacturing and processing profits deduction (0.40%) (0.70%) (0.80%)
Foreign rate differentials (1.50%) (1.50%) (2.00%)
Losses not benefited 5.30% 5.80% 11.40%
Utilization of losses previously not benefited (1.00%) (0.30%) (10.20%)
Earnings of equity accounted investees (1.10%) (1.20%) (1.60%)
Withholding tax 1.40% 0.00% 0.00%
Valuation allowance on deferred tax assets (1.10%) (5.00%) (6.50%)
Mexican flat tax (1.90%) 0.00% 0.00%
Research and development tax credits (4.30%) (2.30%) (1.60%)
Reserve for uncertain tax positions (2.30%) (1.00%) (0.40%)
Re-measurement gains 0.00% (1.10%) 0.00%
Other (0.70%) (0.70%) 0.00%
Effective income tax rate 18.90% 18.50% 16.60%