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Assets Held for Sale and Discontinued Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Discontinued operations |  |  |  |  |  |  |  |  |  |  |
Undiscounted contractual commitments | $ 17,200 |  |  |  | $ 23,300 |  |  |  | $ 17,200 | $ 23,300 |
Liability related to discontinued operation | 12,500 |  |  |  | 16,100 |  |  |  | 12,500 | 16,100 |
Current liability to discontinued operations | 5,462 |  |  |  | 5,197 |  |  |  | 5,462 | 5,197 |
Recorded Supply Obligation |  |  |  |  |  |  |  |  | 5,500 | 5,200 |
Operating revenues |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 2,859 | 3,212 | $ 13,143
Income (loss) from discontinued operations |  |  |  |  |  |  |  |  |  |  |
Income (loss) from discontinued operations, net of tax | (4,266) | $ (12,187) | $ (984) | $ (926) | (1,730) | $ (45,275) | $ 5,025 | $ (817) | (18,363) | (42,797) | 21
Long-term deferred income taxes | 9,495 |  |  |  | 29,326 |  |  |  | 9,495 | 29,326 |
Cash proceeds from sale of businesses in Alaska |  |  |  |  |  |  |  |  |  |  | 35,100
Receivables held for sale |  |  |  |  |  |  |  |  |  |  | 27,000
Proceed from sale of working interest |  |  |  |  |  |  |  |  |  |  | 600,000
Sale of business |  |  |  |  |  |  |  |  |  |  |
Gain on sale of oil and gas operations |  |  |  |  |  |  |  |  |  |  | 22,200
Other long-term assets | $ 595,783 |  |  |  | $ 452,305 |  |  |  | 595,783 | 452,305 |
Charges to reserve for amounts associated with retained interest in properties |  |  |  |  |  |  |  |  | 22,400 |  |
Assets Held-for-sale |  |  |  |  |  |  |  |  |  |  |
Income (loss) from discontinued operations |  |  |  |  |  |  |  |  |  |  |
Impairment charge |  |  |  |  |  |  |  |  | 15,400 | 51,000 |
Impairment of note receivable |  |  |  |  |  |  |  |  | 3,100 |  |
Oil and Gas |  |  |  |  |  |  |  |  |  |  |
Income (loss) from discontinued operations |  |  |  |  |  |  |  |  |  |  |
Income (loss) from discontinued operations |  |  |  |  |  |  |  |  | (3,978) | (5,003) | (1,840)
Less: Impairment charges or other (gains) and losses on sale of wholly owned assets and obligations |  |  |  |  |  |  |  |  | 19,445 | 49,890 | (1,313)
Less: Income tax expense (benefit) |  |  |  |  |  |  |  |  | (5,060) | (14,455) | (548)
Income (loss) from discontinued operations, net of tax |  |  |  |  |  |  |  |  | $ (18,363) | (40,438) | $ 21
Rig Services |  |  |  |  |  |  |  |  |  |  |
Income (loss) from discontinued operations |  |  |  |  |  |  |  |  |  |  |
Less: Impairment charges or other (gains) and losses on sale of wholly owned assets and obligations |  |  |  |  |  |  |  |  |  | 3,146 |
Less: Income tax expense (benefit) |  |  |  |  |  |  |  |  |  | (787) |
Income (loss) from discontinued operations, net of tax |  |  |  |  |  |  |  |  |  | $ (2,359) |

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