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Leases and Restricted Cash - Capital Lease Obligations (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Capital Lease Obligations [Line Items]
Total	$ 637,574	$ 647,047
Less current portion	70,272	47,203
Total	567,302	599,844
RasGas II LNG Carriers [Member]
Capital Lease Obligations [Line Items]
Total	472,085	471,397
Suezmax Tankers [Member]
Capital Lease Obligations [Line Items]
Total	$ 165,489	$ 175,650

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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-Publisher SEC

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid within one year (or one operating cycle, if longer) of the balance sheet date.

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