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Segment Reporting (Details 1) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Segment reporting information profit (loss) |  |  |
Revenues | $ 379,975 | $ 374,008 | $ 343,048
Voyage expenses | 1,387 | 2,042 | 2,034
Vessel operating expenses | 89,046 | 84,577 | 82,374
Depreciation and amortization | 91,919 | 89,347 | 82,686
General and administrative (note 12a and 12b) | 24,120 | 23,247 | 19,764
Gain on sale of vessel (note 17a) |  | (4,340) |
Restructuring charge (note 18) | 0 | 175 | 3,250
Income from vessel operations | 173,503 | 178,960 | 152,940
Segment reporting information additional information |  |  |
Equity income (note 19) | 20,584 | 8,043 | 27,639
Investments in and advances to joint ventures (note 19) | 191,448 | 172,898 | 93,320
Total assets | 3,457,814 | 3,434,934 | 3,430,210
Expenditures for vessels and equipment | 64,685 | 26,652 | 134,926
Expenditures for drydock | 19,638 | 12,727 | 9,729
Liquefied Gas Segment [Member] |  |  |
Segment reporting information profit (loss) |  |  |
Revenues | 269,408 | 264,816 | 252,854
Voyage expenses | (87) | 29 | 1,018
Vessel operating expenses | 47,773 | 46,496 | 50,919
Depreciation and amortization | 62,889 | 60,954 | 59,088
General and administrative (note 12a and 12b) | 13,385 | 12,239 | 11,033
Gain on sale of vessel (note 17a) |  | (4,340) |
Restructuring charge (note 18) |  |  | 1,381
Income from vessel operations | 145,448 | 149,438 | 129,415
Segment reporting information additional information |  |  |
Equity income (note 19) | 20,584 | 8,043 | 27,639
Investments in and advances to joint ventures (note 19) | 191,448 | 172,898 | 93,320
Total assets | 2,911,659 | 2,866,541 | 2,846,685
Expenditures for vessels and equipment | 63,686 | 24,095 | 133,563
Expenditures for drydock | 13,831 | 2,014 | 8,409
Conventional Tanker Segment [Member] |  |  |
Segment reporting information profit (loss) |  |  |
Revenues | 110,567 | 109,192 | 90,194
Voyage expenses | 1,474 | 2,013 | 1,016
Vessel operating expenses | 41,273 | 38,081 | 31,455
Depreciation and amortization | 29,030 | 28,393 | 23,598
General and administrative (note 12a and 12b) | 10,735 | 11,008 | 8,731
Restructuring charge (note 18) |  | 175 | 1,869
Income from vessel operations | 28,055 | 29,522 | 23,525
Segment reporting information additional information |  |  |
Total assets | 546,155 | 568,393 | 583,525
Expenditures for vessels and equipment | 999 | 2,557 | 1,363
Expenditures for drydock | $ 5,807 | $ 10,713 | $ 1,320

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- Definition The gains and losses included in earnings resulting from the sale or disposal of tangible assets and the aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale) and certain intangible assets. + References No definition available. + Details
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- Definition Under all types of charters and contracts for the Partnership's vessels, except for bareboat charters, vessel operating expenses, include crewing, repairs and maintenance, insurance, stores, lube oils and communication expenses. + References No definition available. + Details
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- Definition Voyage expenses are all expenses unique to a particular voyage, including any bunker fuel expenses, port fees, cargo loading and unloading expenses, canal tolls, agency fees and commissions. Voyage expenses are typically paid by the customer under time-charters and by the Partnership under voyage charters. + References No definition available. + Details
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- Definition Voyage revenues currently include revenues only from time- charters accounted for under operating and direct financing leases. Voyage revenues are affected by hire rates and the number of calendar-ship-days a vessel operates. Voyage revenues are also affected by the mix of business between time and voyage charters. Hire rates for voyage charters are more volatile, as they are typically tied to prevailing market rates at the time of a voyage. + References No definition available. + Details
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