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Revenue from Contracts with Customers (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | [1] | Sep. 30, 2018 | [1] | Jun. 30, 2018 | [1] | Mar. 31, 2018 | [1] | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers |  | $ 664,700 | $ 659,800 | $ 655,200 | $ 606,900 | $ 580,500 | $ 511,200 | $ 477,600 | $ 509,000 | $ 2,586,627 | $ 2,078,548 | [2] | $ 1,862,891 | [2]
(Loss) gain on crude contracts |  |  |  |  |  |  |  |  |  | (41,975) | 9,566 | [2] | (63,412) | [2]
Other operating income |  |  |  |  |  |  |  |  |  | 25,897 | 9,581 |  | 10,096 |
Gain on sale of assets |  |  |  |  |  |  |  |  |  | 54 | 127,434 |  | 1,663 |
Total revenues |  |  |  |  |  |  |  |  |  | 2,570,603 | 2,225,129 | [2] | 1,811,238 | [2]
Crude Oil And Condensate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers |  |  |  |  |  |  |  |  |  | 2,153,369 | 1,671,425 |  | 1,524,760 |
Natural Gas Liquids [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers |  |  |  |  |  |  |  |  |  | 98,059 | 75,881 |  | 45,449 |
Natural Gas [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers |  |  |  |  |  |  |  |  |  | 335,199 | 331,242 |  | 292,682 |
United States Onshore [Member] | Crude Oil And Condensate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers |  |  |  |  |  |  |  |  |  | 778,198 | 644,023 |  | 508,045 |
United States Onshore [Member] | Natural Gas Liquids [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers |  |  |  |  |  |  |  |  |  | 53,335 | 43,804 |  | 28,316 |
United States Onshore [Member] | Natural Gas [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers |  |  |  |  |  |  |  |  |  | 28,335 | 27,460 |  | 24,281 |
United States Offshore [Member] | Crude Oil And Condensate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers | [3] |  |  |  |  |  |  |  |  | 403,523 | 208,984 |  | 172,022 |
United States Offshore [Member] | Natural Gas Liquids [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers | [3] |  |  |  |  |  |  |  |  | 10,269 | 6,894 |  | 5,781 |
United States Offshore [Member] | Natural Gas [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers | [3] |  |  |  |  |  |  |  |  | 14,525 | 10,480 |  | 10,839 |
Canada Onshore [Member] | Crude Oil And Condensate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers |  |  |  |  |  |  |  |  |  | 105,651 | 51,013 |  | 92,605 |
Canada Onshore [Member] | Natural Gas Liquids [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers |  |  |  |  |  |  |  |  |  | 14,657 | 5,450 |  | 1,351 |
Canada Onshore [Member] | Natural Gas [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers |  |  |  |  |  |  |  |  |  | 147,613 | 155,125 |  | 129,968 |
Canada Offshore [Member] | Crude Oil And Condensate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers |  |  |  |  |  |  |  |  |  | 170,895 | 147,230 |  | 138,425 |
Malaysia - Sarawak [Member] | Crude Oil And Condensate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers |  |  |  |  |  |  |  |  |  | 282,370 | 241,774 |  | 209,751 |
Malaysia - Sarawak [Member] | Natural Gas Liquids [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers |  |  |  |  |  |  |  |  |  | 19,798 | 19,733 |  | 10,001 |
Malaysia - Sarawak [Member] | Natural Gas [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers |  |  |  |  |  |  |  |  |  | 144,222 | 137,479 |  | 126,975 |
Malaysia - Block K [Member] | Crude Oil And Condensate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers |  |  |  |  |  |  |  |  |  | 406,653 | 378,401 |  | 403,912 |
Malaysia - Block K [Member] | Natural Gas [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers |  |  |  |  |  |  |  |  |  | 504 | $ 698 |  | $ 619 |
Other Locations [Member] | Crude Oil And Condensate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from contracts with customers |  |  |  |  |  |  |  |  |  | $ 6,079 |  |  |  |
[1] | 2018 includes noncontrolling interest in MP GOM.
[2] | Reclassified to conform to current presentation (see Note B).
[3] | 2018 includes revenue attributable to noncontrolling interest in MP GOM, effective November 30, 2018.

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