v2.4.0.6

Description of Business (Details) | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2011 Segments | Dec. 31, 2010 | Dec. 31, 2009
Description of Business [Abstract] |  |  |  |
Number of reportable segments | 2 | 2 |  |
Percentage of ownership in general partnership | 99.55% | 99.55% |  |
Percentage of interest in preferred units | 100.00% | 100.00% |  |
Percentage of common limited partnership interest | 0.45% | 0.45% |  |
Conversion basis of common stock | 0.4464 | 0.4464 | 0.4464 | 0.4464

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- Definition Conversion basis of common stock. + References No definition available. + Details
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- Definition Number of reportable segments. + References No definition available. + Details
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- Definition Percentage of common limited partnership interest. + References No definition available. + Details
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- Definition Percentage of interest in preferred units. + References No definition available. + Details
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- Definition Percentage of ownership in general partnership. + References No definition available. + Details
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- Details
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