Quarterly report pursuant to Section 13 or 15(d)

Dispositions (Summarized Results of Discontinued Operations) (Details)

v3.20.1
Dispositions (Summarized Results of Discontinued Operations) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Income (loss) from discontinued operations $ (63) $ 5,671
Discontinued Operations [Member] | Joint Operating With Republic Of Angola [Member]    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Gain on settlement of drilling obligation   (7,193)
General and administrative expense 80 14
Total operating costs, expenses and (recovery) 80 (7,179)
Operating income (loss) (80) 7,179
Income (loss) from discontinued operations before income taxes (80) 7,179
Income tax expense (benefit) (17) 1,508
Income (loss) from discontinued operations $ (63) $ 5,671