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Commitments and Contingencies - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2017
USD ($)
Contract
Order
Organization
Dec. 31, 2016
USD ($)
Purchase contracts [member]    
Commitments and contingencies [line items]    
Number of purchase contracts subscribed | Contract 2  
Firm order value $ 9,500,000,000  
Purchase contracts [member] | Up to one year [member]    
Commitments and contingencies [line items]    
Number of firm orders in purchase contract | Order 2  
Purchase contracts [member] | Later than 7 years and not later than 10 years [member]    
Commitments and contingencies [line items]    
Number of firm orders in purchase contract | Order 71  
Labor unions [member]    
Commitments and contingencies [line items]    
Number of company's employees 9,045  
Percentage of employees unionized 62.00%  
Number of union organizations | Organization 9  
Labor unions [member] | Panama [member]    
Commitments and contingencies [line items]    
Number of union organizations | Organization 5  
Collective bargaining agreements terms 4 years  
Labor unions [member] | Colombia [member]    
Commitments and contingencies [line items]    
Number of union organizations | Organization 4  
Labor unions [member] | Bottom of range [member] | Colombia [member]    
Commitments and contingencies [line items]    
Collective bargaining agreements terms 2 years  
Labor unions [member] | Top of range [member] | Colombia [member]    
Commitments and contingencies [line items]    
Collective bargaining agreements terms 3 years  
Lines of credit for working capital and letters of credit [member]    
Commitments and contingencies [line items]    
Letters of credit maintained $ 25,500,000 $ 26,600,000
Lines of credit for working capital and letters of credit [member] | Line of credit [member]    
Commitments and contingencies [line items]    
Total line of credit 212,300,000  
Committed line of credit 20,000,000  
Uncommitted lines of credit 192,300,000  
Lines of credit for working capital and letters of credit [member] | Banco General line of credit [member]    
Commitments and contingencies [line items]    
Committed line of credit 15,000,000  
Lines of credit for working capital and letters of credit [member] | Banco General overdraft line of credit [member]    
Commitments and contingencies [line items]    
Committed line of credit 5,000,000  
Lines of credit for working capital and letters of credit [member] | Bladex line of credit [member]    
Commitments and contingencies [line items]    
Uncommitted lines of credit 100,000,000  
Lines of credit for working capital and letters of credit [member] | Citibank line of credit [member]    
Commitments and contingencies [line items]    
Uncommitted lines of credit 77,300,000  
Lines of credit for working capital and letters of credit [member] | Banco Nacional De Panama line of credit [member]    
Commitments and contingencies [line items]    
Uncommitted lines of credit 15,000,000  
Lines of credit for working capital and letters of credit [member] | Borrowing due through 2018 [member]    
Commitments and contingencies [line items]    
Line of credit balance amount $ 127,800,000  
Lines of credit for working capital and letters of credit [member] | Borrowing due through 2017 [member]    
Commitments and contingencies [line items]    
Line of credit balance amount   $ 83,500,000
Covenants [member] | Bottom of range [member]    
Commitments and contingencies [line items]    
Earnings before income taxes, depreciation, amortization, and restructuring, or rent cost ("EBITDAR") to a fixed charge ratio 2.50%  
Minimum tangible net worth $ 160,000,000  
EBITDAR to a finance charge expense ratio 2.0  
Minimum unrestricted cash balance $ 50,000,000  
Cash, cash equivalents and short-term investments $ 75,000,000  
Covenants [member] | Top of range [member]    
Commitments and contingencies [line items]    
Total liability plus operating leases minus operating cash to tangible net worth ratio 5.5  
Long-term obligations to an EBITDAR ratio 6.0