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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2013
Accumulated Other Comprehensive Income | The following details the components of AOCI and related tax effects for the three years ended December 31, 2013. Amounts included in AOCI exclusively relate to our derivative activity (in thousands).
| Gross |  |  | Tax Effect |  |  | Net of Tax |
Accumulated other comprehensive income at December 31, 2010 | $ | 111,062 |  |  | $ | (43,592 | ) |  | $ | 67,470 |
Contract settlements reclassified to income |  | (132,201 | ) |  |  | 50,005 |  |  |  | (82,196 | )
Change in unrealized deferred hedging gains |  | 275,817 |  |  |  | (104,464 | ) |  |  | 171,353 |
Accumulated other comprehensive income at December 31, 2011 |  | 254,678 |  |  |  | (98,051 | ) |  |  | 156,627 |
Contract settlements reclassified to income |  | (236,305 | ) |  |  | 91,871 |  |  |  | (144,434 | )
Change in unrealized deferred hedging gains |  | 119,182 |  |  |  | (47,466 | ) |  |  | 71,716 |
Accumulated other comprehensive income at December 31, 2012 |  | 137,555 |  |  |  | (53,646 | ) |  |  | 83,909 |
Contract settlements reclassified to income |  | (120,443 | ) |  |  | 46,973 |  |  |  | (73,470 | )
Change in unrealized deferred hedging losses |  | (6,890 | ) |  |  | 2,687 |  |  |  | (4,203 | )
Accumulated other comprehensive income at December 31, 2013 | $ | 10,222 |  |  | $ | (3,986 | ) |  | $ | 6,236 |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669686-108580 + Details
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