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Derivative Financial Instruments (Details) (USD $) | 3 Months Ended |  | 3 Months Ended |  |  | 3 Months Ended |  |  |  | 3 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2014 CRNF Term loan facility | Mar. 31, 2014 Commodity derivatives | Mar. 31, 2013 Commodity derivatives | Mar. 31, 2014 Commodity swap | Mar. 31, 2013 Commodity swap | Mar. 31, 2014 Interest rate swap | Mar. 31, 2013 Interest rate swap | Mar. 31, 2014 Not designated as hedges Commodity swap bbl | Dec. 31, 2013 Not designated as hedges Commodity swap bbl | Mar. 31, 2014 Designated as hedges Interest rate swap agreements entered into on June 30, 2011 CRNF | Mar. 31, 2014 Designated as hedges Interest rate swap CRNF agreement | Jul. 01, 2011 Designated as hedges Interest rate swap CRNF agreement | Jun. 30, 2011 Designated as hedges Interest rate swap CRNF agreement | Mar. 31, 2014 Designated as hedges Interest rate swap agreements entered into on July 1, 2011 CRNF
Derivative Financial Instruments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current period settlements on derivative contracts | $ 21,100,000 | $ (52,500,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on derivatives, net | 109,400,000 | (20,000,000) |  | (100,000) | (2,200,000) | 109,500,000 | (17,800,000) |  |  |  |  |  |  |  |  |
Number of barrels |  |  |  |  |  |  |  |  |  | 18,100,000 | 23,300,000 |  |  |  |  |
Unrealized gain |  |  |  |  |  |  |  |  |  | 72,200,000 |  |  |  |  |  |
Portion of net unrealized gain in current assets |  |  |  |  |  |  |  |  |  | 70,700,000 |  |  |  |  |  |
Portion of net unrealized gain in non-current assets |  |  |  |  |  |  |  |  |  | 1,500,000 |  |  |  |  |  |
Number of floating-to-fixed interest rate swap agreements |  |  |  |  |  |  |  |  |  |  |  |  | 2 | 1 | 1 |
Borrowing capacity on credit facility |  |  | 125,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate notional amount |  |  |  |  |  |  |  |  |  |  |  |  | 62,500,000.0 |  |  |
Floating rate basis |  |  |  |  |  |  |  |  |  |  |  | three month LIBOR |  |  |  | three month LIBOR
Fixed rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 1.94% |  |  |  | 1.975%
Settlement period |  |  |  |  |  |  |  |  |  |  |  | 90 days |  |  |  | 90 days
Average fixed rate of interest (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  | 1.96% |  |  |
Effective rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  | 4.56% |  |  |
Realized loss on the interest rate swap re-classed from AOCI into interest expense |  |  |  |  |  |  |  | $ 300,000 | $ 300,000 |  |  |  |  |  |  |

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- Definition The amount of net gains or losses on interest rate cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
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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 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 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 + Details
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- Definition Number of interest rate derivative instruments held by the entity at the reporting date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959 + Details
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