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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) |

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