Number of debt instruments.

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- Definition

Number Of Vessels

+ References

No definition available.

+ Details

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- Definition

Number of Long Term Time Charter Contracts

+ References

No definition available.

+ Details

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Article 9

+ 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.

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- Definition

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30700-110894

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30690-110894

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Long-Term Debt - Additional Information - Term Loans (Detail) $ in Thousands, € in Millions	3 Months Ended	12 Months Ended
	Nov. 30, 2013 vessel	Dec. 31, 2016 USD ($) contract term_loan vessel	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2016 EUR (€)	Dec. 31, 2015 EUR (€)
Debt Instrument [Line Items]
Carrying amount of long-term debt \| $		$ 6,730,132	$ 7,480,374
Number of vessels \| vessel	5
Unrealized foreign exchange gain (loss) \| $		$ (6,548)	(2,195)	$ 13,431
Euro-denominated Term Loans Due Through 2023 [Member]
Debt Instrument [Line Items]
Number of debt instruments \| term_loan		2
Carrying amount of long-term debt		$ 219,700	$ 241,798		€ 208.9	€ 222.7
Number of long term time charter contracts \| contract		2
Number of vessels \| vessel		2
Euro-denominated Term Loans Due Through 2023 [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt instrument spread on variable rate		0.60%	0.60%
Euro-denominated Term Loans Due Through 2023 [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt instrument spread on variable rate			2.25%