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JOINT VENTURES - Ares (Details)			1 Months Ended
	Oct. 31, 2020 USD ($)	Oct. 27, 2020 USD ($)	Feb. 28, 2018 MW MMcf	Dec. 31, 2020 USD ($) plant
Business Acquisition [Line Items]
Number of plants | plant				2
Redeemable noncontrolling interest, equity, preferred, redemption value				$ 138,000,000
EHP Notes
Business Acquisition [Line Items]
Cash acquired	$ 2,000,000	$ 2,000,000
Percentage of common acquired		20.80%
EHP Notes | Senior Notes (Unsecured)
Business Acquisition [Line Items]
Debt instrument face amount		$ 300,000,000
Ares JV | Class A common interest
Business Acquisition [Line Items]
Percentage of common interest held by CRC			50.00%
Ares JV | Class C common interest
Business Acquisition [Line Items]
Percentage of common interest held by CRC			95.25%
Ares JV | ECR | Class A common interest
Business Acquisition [Line Items]
Percentage of common interest held by ECR			50.00%
Ares JV | ECR | Class C common interest
Business Acquisition [Line Items]
Percentage of common interest held by ECR			4.75%
Ares JV | ECR | Class B preferred interest
Business Acquisition [Line Items]
Percentage of common interest held by ECR			100.00%
Ares JV | Natural gas power and Gas processing plants
Business Acquisition [Line Items]
Power plant capacity | MW			550
Gas processing plant capacity | MMcf			200

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