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Derivatives And Fair Value (Effect Of Derivative Instruments On The Condensed Consolidated Statements Of Operations) (Details) - Crude Oil Swaps [Member] $ in Thousands | 3 Months Ended
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Mar. 31, 2019 USD ($)
Derivative Instruments, Gain (Loss) [Line Items] |
Derivative, gain (loss) | $ (1,912)
Realized Gain - Contract Settlements [Member] |
Derivative Instruments, Gain (Loss) [Line Items] |
Derivative, gain (loss) | 1,131
Unrealized Loss [Member] |
Derivative Instruments, Gain (Loss) [Line Items] |
Derivative, gain (loss) | $ (3,043)

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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=109980867&loc=SL5618551-113959 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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