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Investment in and advances to Equity-Accounted for Investment - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
May 30, 2017
Schedule of Equity Method Investments [Line Items]        
Percentage of voting interests acquired     50.00%  
Long-term debt, gross $ 562,861 $ 741,992    
Equity income (loss) 2,345 1,220 $ (25,370)  
High-Q Joint Venture        
Schedule of Equity Method Investments [Line Items]        
Long-term debt, gross $ 31,900 $ 37,500    
High-Q Joint Venture        
Schedule of Equity Method Investments [Line Items]        
Percentage Of Exposure To Loan Guarantee 50.00%      
Teekay Tanker Operations Ltd        
Schedule of Equity Method Investments [Line Items]        
Percentage of voting interests acquired       50.00%