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Investments - Teekay Tankers - Ship - to - Ship Transfer Business - Additional Information (Detail)
$ / shares in Units, $ in Thousands, shares in Millions
1 Months Ended 12 Months Ended
Jul. 31, 2015
Vessel
$ / shares
Jul. 31, 2015
USD ($)
$ / shares
shares
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Net Investment Income [Line Items]          
Amortization of intangible assets     $ 13,600 $ 13,200 $ 18,200
Joint venture ownership percentage     17.62%    
Equity income     $ 102,871 $ 128,114 $ 136,538
Ship-to-Ship Transfer Business (SPT) [Member] | Teekay Tankers [Member]          
Net Investment Income [Line Items]          
Purchase price of acquisition   $ 47,300      
Number of vessels | Vessel 6        
Amortization of intangible assets     $ 1,300    
Joint venture ownership percentage     50.00%    
Equity income   $ 8,700      
Ship-to-Ship Transfer Business (SPT) [Member] | Teekay Tankers [Member] | Class B [Member]          
Net Investment Income [Line Items]          
Number of common stock issued | shares   6.5 6.5    
Shares issued, price per share | $ / shares $ 6.99 $ 6.99      
Ship-to-Ship Transfer Business (SPT) [Member] | Working Capital [Member] | Teekay Tankers [Member]          
Net Investment Income [Line Items]          
Purchase price of acquisition   $ 1,800