Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

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- Definition

Expected maturity amount of foreign currency derivatives in next fiscal year.

+ References

No definition available.

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- Definition

Expected maturity amount of foreign currency derivatives in year two.

+ References

No definition available.

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- Definition

Average contractual rate at which a foreign currency can be purchased or sold.

+ References

No definition available.

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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.

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- Definition

Fair value as of the balance sheet date of all foreign currency derivatives 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 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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Derivative Instruments and Hedging Activities - Commitment of Foreign Currency Forward Contracts (Detail) - Dec. 31, 2016 $ in Thousands	USD ($) € / $ NOK / $	NOK € / $ NOK / $	EUR (€) € / $ NOK / $
Derivative [Line Items]
Fair Value / Carrying Amount of Asset (Liability)	$ (2,993)
Expected Maturity Amount of Foreign Currency Derivatives in Next Fiscal Year	75,556
Expected Maturity Amount of Foreign Currency Derivatives in Year Two	$ 12,719
Euro [Member]
Derivative [Line Items]
Average Forward Rate \| € / $	0.92	0.92	0.92
Fair Value / Carrying Amount of Asset (Liability)	$ (304)
Expected Maturity Amount of Foreign Currency Derivatives in Next Fiscal Year	14,879
Expected Maturity Amount of Foreign Currency Derivatives in Year Two	$ 0
Euro [Member] \| Foreign currency forward contracts [Member]
Derivative [Line Items]
Contract Amount in Foreign Currency \| €			€ 13,750,000
Norwegian Kroner [Member]
Derivative [Line Items]
Average Forward Rate \| NOK / $	8.31	8.31	8.31
Fair Value / Carrying Amount of Asset (Liability)	$ (2,689)
Expected Maturity Amount of Foreign Currency Derivatives in Next Fiscal Year	60,677
Expected Maturity Amount of Foreign Currency Derivatives in Year Two	$ 12,719
Norwegian Kroner [Member] \| Foreign currency forward contracts [Member]
Derivative [Line Items]
Contract Amount in Foreign Currency \| NOK		NOK 610,000,000