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DERIVATIVE INSTRUMENTS: (Details) | 3 Months Ended | 5 Months Ended
--- | --- | ---
Mar. 31, 2022 USD ($) item $ / item | Mar. 31, 2022 USD ($) item
Derivatives designated as hedging instruments under ASC 815 |  |
Number of derivative contracts entered | item | 2 |
Derivative instruments held | item | 0 | 0
Call Option | Natural Gas | Derivatives designated as hedging instruments |  |
Derivatives designated as hedging instruments under ASC 815 |  |
Gas volume (MMBTUs) | 5,285,000 | 5,285,000
Hedge premium ($per MMBTU) | $ / item | 0.55 |
Cost (million $) | $ (1,700,000) | $ (2,900,000)
Profit (million $) | 500,000 | 500,000
Net favorable/unfavorable effect (million $) | $ (1,200,000) | $ (2,400,000)
Derivative instruments held | 500,000 | 500,000
Swap contracts | Natural Gas | Derivatives designated as hedging instruments |  |
Derivatives designated as hedging instruments under ASC 815 |  |
Gas volume (MMBTUs) | 5,285,000 | 5,285,000
Reference price (swap: $per MMBTU)) | $ / item | 3.75 |
Profit (million $) | $ 1,700,000 | $ 4,700,000
Net favorable/unfavorable effect (million $) | $ 1,700,000 | $ 4,700,000
Derivative instruments held | 2,300,000 | 2,300,000

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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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