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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Tax rate 25.00% 25.00% 25.00%
Deferred tax assets $ 19,099 $ 18,339 $ 12,708
Temporary differences associated with investments in subsidiaries, for which deferred tax liabilities have not been recognized $ 397,900 237,100  
Colombia [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Effective rate 37.00%    
Short term position [member] | Colombia [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Tax rate 37.00%    
Long term position [member] | Colombia [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Tax rate 33.00%    
Carried forward tax losses of Copa Colombia [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets $ 7,300 $ 10,100