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Reconciliation of Income and Expenses (Details 3) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Operating revenues | $ 43,087 | $ 139,580 | $ 98,023 | $ 277,115
Operating expenses | 442,725 | 103,057 | 1,015,677 | 201,307
Operating income (loss) | (399,638) | 36,523 | (917,654) | 75,808
Other income | 188 | 1,010 | 2,069 | 1,025
Interest expense | 33 | 31 | 55 | 57
Income (loss) from discontinued operations before income taxes | (399,483) | 37,502 | (915,640) | 76,776
Income taxes | (148,068) | 13,621 | (339,620) | 27,783
Income (loss) from discontinued operations | $ (251,415) | $ 23,881 | $ (576,020) | $ 48,993

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