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Derivative Instruments - Additional Information (Detail)
$ in Thousands, NOK in Millions
 12 Months Ended
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2015
NOK
Derivative [Line Items]        
Restricted cash - current and - long-term $ 111,500 $ 46,000    
Unrealized gains (losses) on derivatives 22,876 34,079 $ (16,019)  
Norwegian Kroner-denominated Bond due in 2017 [Member]        
Derivative [Line Items]        
Senior unsecured bonds issued | NOK       NOK 700
Norwegian Kroner-denominated Bond due in 2018 [Member]        
Derivative [Line Items]        
Senior unsecured bonds issued | NOK       900
Norwegian Kroner denominated bonds due May 2020 [Member]        
Derivative [Line Items]        
Senior unsecured bonds issued | NOK       NOK 1,000
Toledo Spirit time-charter derivative [Member]        
Derivative [Line Items]        
Derivative fair value, net 6,296 2,137    
Interest Rate Swaps And Cross Currency Swaps Agreement [Member]        
Derivative [Line Items]        
Fair Value /Carrying Amount of Liability 209,200      
Restricted cash - current and - long-term 44,800      
Cross Currency Swap Agreements [Member]        
Derivative [Line Items]        
Unrealized gains (losses) on derivatives (57,800) (51,800) (15,400)  
Realized losses on derivatives $ (7,600) $ (2,200) $ (300)