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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010
Consolidated Balance Sheets [Abstract] |  |
Accounts receivable, including non-trade | $ 38,120 | $ 35,960
Accounts receivable, including related party balance | 3,487 | 0
Accumulated depreciation on vessels and equipment | 2,375,604 | 1,997,411
Accumulated depreciation on vessels under capital leases | 163,939 | 172,113
Minimum range of interest | 4.40% | 4.40%
Maximum range of interest | 8.00% | 8.00%
Amounts due to joint venture partners | $ 13,282 | $ 13,282
Common stock, par value | $ 0.001 | $ 0.001
Common stock, share authorized | 725,000,000 | 725,000,000
Common stock, share issued | 74,391,691 | 73,749,793
Common stock, share outstanding | 68,732,341 | 72,012,843

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