v2.4.0.8

Long-Term Debt - Additional Information (Detail) (Revolving Credit Facilities [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Number of debt instruments	3
Maximum borrowings available	$ 728.8
Undrawn amount of revolving credit facility	148.2
Reference rate for the variable rate of the debt instrument	LIBOR
Amount reduced under revolving credit facilities, 2014	94.0
Amount reduced under revolving credit facilities, 2015	120.9
Amount reduced under revolving credit facilities, 2016	89.1
Amount reduced under revolving credit facilities, 2017	395.9
Amount reduced under revolving credit facilities, thereafter	28.9
Debt Instrument, collateral description	The Revolvers are collateralized by 21 of the Company's vessels, together with other
Minimum hull coverage ratio	105.00%
Actual hull coverage ratio	114.30%
Amount of liquidity and undrawn revolving credit line	35.0
Liquidity and undrawn revolving credit line as percentage of debt	5.00%
Maintain the greater of free cash liquidity	$ 100.0
Minimum liquidity as a percentage of debt	7.50%
Minimum [Member]
Debt Instrument [Line Items]
Percentage of margin	0.45%	0.45%
Maximum [Member]
Debt Instrument [Line Items]
Percentage of margin	0.60%	0.60%

X

- Definition

The actual hull coverage ratio of the Company as at period end.

+ References

No definition available.

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X

- Definition

The minimum free liquidity and undrawn revolving credit line required by covenants of certain debt currently held by the Company.

+ References

No definition available.

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- Definition

The minimum free liquidity and undrawn revolving credit line required by covenants of certain debt currently held by the Company, as a percentage of total debt.

+ References

No definition available.

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- Definition

The minimum hull coverage ratio as required by certain covenants for debts held by the Company.

+ References

No definition available.

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- Definition

Debt covenants from certain debts held by the Company that is guaranteed by the Company's parent, which requires the Company's parent to maintain a minimum amount of cash and cash equivalents.

+ References

No definition available.

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- Definition

Debt covenants from certain debts held by the Company that is guaranteed by the Company's parent, which requires the Company's parent to maintain a minimum amount of free cash and undrawn committed revolving credit lines, as a percentage of the parent's total consolidated debt.

+ References

No definition available.

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- Definition

Number Of Debt Instruments

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X

- 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

Discussion of whether the debt instrument is secured or unsecured, and, if secured, a description of the collateral and guarantees required or provided.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

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-Subparagraph (SX 210.5-02.22(a)(1))

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- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

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- Definition

Amount of long-term debt of the registrant maturing in the third fiscal year following the latest fiscal year.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.12-04.(a))

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- Definition

Amount of long-term debt of the registrant maturing in the fifth fiscal year following the latest fiscal year.

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-Publisher FASB

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- Definition

Amount of long-term debt of the registrant maturing in the fourth fiscal year following the latest fiscal year.

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Amount of long-term debt of the registrant maturing in the second fiscal year following the latest fiscal year.

+ References

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-Publisher FASB

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- Definition

Amount of long-term debt of the registrant maturing in the next fiscal year following the latest fiscal year.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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-Publisher FASB

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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-Publisher FASB

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