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Derivative Instruments and Hedging Activities - Interest Rate Swap Agreements (Footnote) (Detail)
$ in Thousands, € in Millions
Dec. 31, 2017
USD ($)
Dec. 31, 2017
EUR (€)
Aug. 31, 2015
U.S. Dollar-denominated interest rate swaption 1 | LIBOR      
Derivative [Line Items]      
Fixed interest rates 2.00% 2.00%  
Interest rate swap aggregate principal amount used to economically hedge on new debt | $ $ 160,000    
U.S. Dollar-denominated interest rate swaption 1 | LIBOR | Third Party      
Derivative [Line Items]      
Fixed interest rates     1.97%
Euro-denominated interest rate swaps      
Derivative [Line Items]      
Reducing principal amount of interest rate swaps $ 84,200 € 70.1  
Interest rate swap aggregate principal amount used to economically hedge on new debt | €   € 194.1  
Teekay LNG | U.S. Dollar-denominated interest rate swaption 1 | LIBOR      
Derivative [Line Items]      
Fixed interest rates     3.10%
Minimum      
Derivative [Line Items]      
Variable interest rate on debt 0.30% 0.30%  
Maximum      
Derivative [Line Items]      
Variable interest rate on debt 4.00% 4.00%