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Derivative Instruments - Summary of Cross Currency Swap Agreements (Detail) - Cross Currency Swap Agreements [Member] | 12 Months Ended |
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Dec. 31, 2015 USD ($) | Dec. 31, 2015 NOK
Derivative [Line Items] |  |
Fair Value / Carrying Amount of (Liability) | $ (128,782,000) |
Norwegian Kroner-denominated Bond due in 2017 [Member] | NIBOR [Member] |  |
Derivative [Line Items] |  |
Principal amount | $ 125,000,000 | NOK 700,000,000
Floating Rate Receivable, Margin | 5.25% | 5.25%
Fixed Interest Payment on Cross Currency Rate Swap | 6.88% | 6.88%
Fair Value / Carrying Amount of (Liability) | $ (49,703,000) |
Weighted-Average Remaining Term (Years) | 1 year 3 months 18 days |
Norwegian Kroner-denominated Bond due in 2018 [Member] | NIBOR [Member] |  |
Derivative [Line Items] |  |
Principal amount | $ 150,000,000 | NOK 900,000,000
Floating Rate Receivable, Margin | 4.35% | 4.35%
Fixed Interest Payment on Cross Currency Rate Swap | 6.43% | 6.43%
Fair Value / Carrying Amount of (Liability) | $ (54,027,000) |
Weighted-Average Remaining Term (Years) | 2 years 8 months 12 days |
Norwegian Kroner denominated bonds due May 2020 [Member] | NIBOR [Member] |  |
Derivative [Line Items] |  |
Principal amount | $ 134,000,000 | NOK 1,000,000,000
Floating Rate Receivable, Margin | 3.70% | 3.70%
Fixed Interest Payment on Cross Currency Rate Swap | 5.92% | 5.92%
Fair Value / Carrying Amount of (Liability) | $ (25,052,000) |
Weighted-Average Remaining Term (Years) | 4 years 4 months 24 days |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The percentage points added to the reference rate to compute the variable rate on the interest rate derivative. + References No definition available. + Details
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- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Fair value as of the balance sheet date of all foreign currency derivative liabilities not designated as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959 + Details
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