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Related Party Transactions (Details) (USD $) In Millions, unless otherwise specified |  | 3 Months Ended | 1 Months Ended | 3 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2010 Goldman Sachs Funds and Kelso Funds | Mar. 31, 2012 Affiliate of GS | Apr. 30, 2011 Affiliate of GS CRLLC CRNF credit facility | Mar. 31, 2012 GS, Kelso and the president, chief executive officer and chairman of the board of CVR | Mar. 31, 2011 GS, Kelso and the president, chief executive officer and chairman of the board of CVR
Related Party Transactions |  |  |  |  |
Percentage of outstanding shares beneficially owned | 40.00% |  |  |  |
Financing and Other |  |  |  |  |
Underwriter fees |  | $ 5.7 |  |  |
Additional third party fees and expenses associated with the offering |  |  | 2.0 |  |
Expenses related to Registration Rights Agreement |  |  |  | $ 0 | $ 0.3

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