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Derivatives and Fair Value (Effect of Derivative Instruments on the Condensed Consolidated Statements of Operations) (Details) - Crude Oil Swaps [Member] - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items] |  |
Derivative instruments gain (loss), net | $ (31,758) | $ (5,954)
Cash Settlements Paid On Matured Derivative Contracts, Net [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Derivative instruments gain (loss), net | (12,500) | (1,710)
Cash Settlements Not Paid On Matured Derivative Contracts, Net [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Derivative instruments gain (loss), net | $ (19,258) | $ (4,244)

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 + Details
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