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Kommandor LLC (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011
Noncontrolling Interest [Line Items] |  |
Oil and gas processing equipment, percentage of cost | 100.00% |
Property and equipment | $ 2,051,796,000 | $ 1,815,012,000
Noncontrolling Interest, Ownership Percentage by Parent | 81.00% |
Working interest | 70.00% |
Estimated cash outlay | 19,000,000 |
Conversion Of The Vessel [Member] |  |
Noncontrolling Interest [Line Items] |  |
Property and equipment | 148,700,000 |
Topside Oil And Gas Processing Facilities [Member] |  |
Noncontrolling Interest [Line Items] |  |
Property and equipment | $ 196,300,000 |

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