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Derivative Financial Instruments (Details) (USD $) | 3 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended | 1 Months Ended |  |  | 1 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2010 | Sep. 30, 2010 | Jun. 30, 2010 | Mar. 31, 2010 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Apr. 13, 2011 CRNF Term loan facility | Dec. 31, 2009 Swap agreements | Dec. 31, 2011 Other derivative agreements | Dec. 31, 2010 Other derivative agreements | Dec. 31, 2009 Other derivative agreements | Dec. 31, 2010 Interest rate swap agreements | Dec. 31, 2009 Interest rate swap agreements | Dec. 31, 2011 Designated as hedges Interest rate swap agreements CRNF agreement | Jun. 30, 2011 Designated as hedges Interest rate swap agreements CRNF agreement | Dec. 31, 2011 Designated as hedges Interest rate swap agreements entered into on June 30, 2011 CRNF D | Dec. 31, 2011 Designated as hedges Interest rate swap agreements entered into on July 1, 2011 CRNF D | Jun. 30, 2010 Not designated as hedges Interest rate swap agreements CRLLC | Mar. 31, 2010 Not designated as hedges Interest rate swap agreements CRLLC | Dec. 31, 2011 Not designated as hedges Commodity derivative contracts entered into during September 2011 barrel | Oct. 31, 2009 Terminated derivative contract Commodity derivative contracts entered into on June 16, 2005 CRLLC
Derivative Financial Instruments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Realized gain (loss) |  |  |  |  |  |  |  |  |  |  |  |  | $ (14,331,000) | $ (7,182,000) | $ 721,000 | $ (6,646,000) | $ (2,860,000) | $ (6,518,000) |  |  |  |  |  |  |  |
Unrealized gain (loss) |  |  |  |  |  |  |  |  | 85,262,000 | 634,000 | (37,791,000) |  | (40,903,000) | 85,262,000 | (2,196,000) | (1,847,000) | 2,830,000 | 4,959,000 |  |  |  |  |  |  |  |
Total gain (loss) on derivatives, net | 103,179,000 | (9,925,000) | 6,932,000 | (22,106,000) | (9,320,000) | (1,014,000) | 7,339,000 | 1,490,000 | 78,080,000 | (1,505,000) | (65,286,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of barrels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,000,000 |
Net unrealized gain |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 80,400,000 |
Portion of net unrealized gain in current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 61,600,000 |
Portion of net unrealized gain in long-term assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18,800,000 |
Number of agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 | 2 |  |  |  |  |  |
Borrowing capacity on credit facility |  |  |  |  |  |  |  |  |  |  |  | 125,000,000 |  |  |  |  |  |  | 125,000,000 |  |  |  |  |  |  |
Aggregate notional amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 62,500,000 |  |  |  | 110,000,000 | 180,000,000 |  |
Floating rate basis |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Three months LIBOR | Three months LIBOR | Three months LIBOR |  |  |
Fixed rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.94% | 1.975% | 4.195% |  |  |
Settlement period (in days) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 90 | 90 |  |  |  |
Average fixed rate of interest (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.96% |  |  |  |  |  |  |
Effective rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.69% |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 400,000 |  |  |  |  |  |  |
Settlement paid as a result of early termination |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,900,000

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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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