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Supplemental Cash Flow Information - Additional Information (Detail) (USD $) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2010 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Schedule Of Supplemental Cash Flow [Line Items] |  |  |  |
Cash interest paid on long-term debt, advances from affiliates and capital lease obligations |  | $ 131,100,000 | $ 154,300,000 | $ 135,500,000
Termination fee |  |  | 22,600,000 |
Income taxes paid |  | 1,500,000 | 1,500,000 | 200,000
Purchase price of joint ventures by partnership through issuance of common units | 38,070,000 |  |  | 38,324,000
Issuance of common units | 1,052,749 |  |  |
Excalibur and Excelsior [Member] |  |  |  |
Schedule Of Supplemental Cash Flow [Line Items] |  |  |  |
Purchase price of joint ventures by partnership through issuance of common units | $ 37,300,000 |  |  |
Percentage of ownership in joint venture | 50.00% |  |  |
Issuance of common units | 1,100,000 |  |  |

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