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Derivative financial instruments - Impact of commodity derivatives on earnings (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Derivative instruments |  |  |
Gain (loss) on commodity derivatives | $ 25,544 | $ (25,324) | $ (32,389)
Net cash receipts from (payments on) commodity derivatives | 22,895 | (42,437) | (25,219)
Oil derivatives |  |  |
Derivative instruments |  |  |
Gain (loss) on commodity derivatives | 6,459 | (14,985) | (24,885)
Net cash receipts from (payments on) commodity derivatives | 4,576 | (23,695) | (19,034)
Natural gas derivatives |  |  |
Derivative instruments |  |  |
Gain (loss) on commodity derivatives | 19,085 | (10,339) | (7,504)
Net cash receipts from (payments on) commodity derivatives | $ 18,319 | $ (18,742) | $ (6,185)

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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4C Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 4CC -SubTopic 10 -Topic 815 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4CC + 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480237/815-40-50-5 + Details
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- Details
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- Details
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