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Concentration of Credit Risk and Major Customers - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Concentration Risk [Line Items]
Receivables related to contracts with customers	$ 330,122	$ 145,929
Direct Energy Business Marketing LLC
Concentration Risk [Line Items]
Revenue from contracts with customers	235,760	167,390	$ 214,980
Citadel Energy Marketing LLC
Concentration Risk [Line Items]
Revenue from contracts with customers	334,407
NJR Energy Services Company
Concentration Risk [Line Items]
Revenue from contracts with customers			$ 147,540
Accounts Receivable | Customer Concentration Risk
Concentration Risk [Line Items]
Receivables related to contracts with customers	330,122	145,929
Accounts Receivable | Customer Concentration Risk | Direct Energy Business Marketing LLC
Concentration Risk [Line Items]
Receivables related to contracts with customers	38,814	$ 19,995
Accounts Receivable | Customer Concentration Risk | Citadel Energy Marketing LLC
Concentration Risk [Line Items]
Receivables related to contracts with customers	$ 36,595

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- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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