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Concentrations of Credit Risk and Major Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Concentration Risk [Line Items]
Receivables related to contracts with customers	$ 133,480	$ 252,424
NJR Energy Services Company
Concentration Risk [Line Items]
Revenue from contracts with customers	147,540	219,472	$ 147,595
Direct Energy Business Marketing LLC
Concentration Risk [Line Items]
Revenue from contracts with customers	214,980	184,668	$ 153,565
Accounts Receivable | Customer Concentration Risk
Concentration Risk [Line Items]
Receivables related to contracts with customers	133,480	252,424
Accounts Receivable | Customer Concentration Risk | Gas Wholesalers
Concentration Risk [Line Items]
Receivables related to contracts with customers	115,641	232,638
Accounts Receivable | Customer Concentration Risk | NGL, Condensate & Processing Facilities
Concentration Risk [Line Items]
Receivables related to contracts with customers	10,140	12,595
Accounts Receivable | Customer Concentration Risk | Other
Concentration Risk [Line Items]
Receivables related to contracts with customers	7,699	7,191
Accounts Receivable | Customer Concentration Risk | NJR Energy Services Company
Concentration Risk [Line Items]
Receivables related to contracts with customers	15,401	30,872
Accounts Receivable | Customer Concentration Risk | Direct Energy Business Marketing LLC
Concentration Risk [Line Items]
Receivables related to contracts with customers	$ 23,859	$ 26,417

X

- 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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