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Basis of presentation and Significant Accounting Policies (Details 1) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Summary of Drydocking activity |  |  |
Balance at January 1 | $ 2,019,576 |  |
Cost incurred for drydocking | (19,638) | (12,727) | (9,729)
Balance at December 31 | 2,021,125 | 2,019,576 |
Drydocking Activity [Member] |  |  |
Summary of Drydocking activity |  |  |
Balance at January 1 | 24,393 | 20,477 | 15,257
Cost incurred for drydocking | 19,638 | 12,727 | 9,729
Sale of vessel |  | (1,477) |
Dry-dock amortization | (9,582) | (7,334) | (4,509)
Balance at December 31 | $ 34,449 | $ 24,393 | $ 20,477

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- Definition Payments for vessel drydocking. + References No definition available. + Details
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- Details
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- Definition Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References No definition available. + Details
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- Definition The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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- Definition Current year divestiture of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References No definition available. + Details
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