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OTHER COMMITMENTS AND CONTINGENCIES (Details) | 0 Months Ended | 12 Months Ended | 96 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2011 USD ($) tax_lease | Dec. 31, 2003 GBP (£) tax_lease | Dec. 31, 2011 USD ($) tax_lease | Dec. 31, 2010 USD ($)
Commitments and Contingencies Disclosure [Abstract] |  |  |  |
Book value of vessels secured against long-term loans and capital leases | $ 1,703,196,000 |  | $ 1,703,196,000 | $ 1,616,814,000
Tax lease benefits: |  |  |  |
Number of tax leases | 1 | 6 |  |
Gross amount received from tax lease benefit (in GBP) |  | 41,000,000 |  |
Number of tax leases terminated |  |  | 5 |
Number of tax leases, accrue benefits over term of lease |  |  | 2 |
Other commitment to pay third party | $ 1,000,000 |  | $ 1,000,000 |

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- Definition The carrying amount, as of the date of the latest financial statement presented, of all assets that are pledged as collateral for the payment of the related debt obligation primarily arising from secured borrowings, repurchase agreements or other current or potential obligations, where the secured party does not have the right by contract or custom to sell or re-pledge the collateral and therefore are not reclassified and separately reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6862952&loc=SL6224234-111729 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS140-4/FIN46(R)-8 -Paragraph B6 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 140 -Paragraph 17 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6862952&loc=d3e113969-111729 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6862952&loc=SL6226653-111729 + Details
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