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Revenue from contracts with customers
 6 Months Ended
Jun. 30, 2025
Revenue from Contract with Customer [Abstract]  
Revenue from contracts with customers Revenue from contracts with customers
Revenue is recognized when a performance obligation is satisfied by transferring control over a product or service to a customer. Revenue is measured based on consideration specified in a contract with a customer and excludes any sales incentives and amounts collected on behalf of third parties. The Company is considered an agent for certain taxes collected from customers. As such, the Company presents revenues net of these taxes at the time of sale to be remitted to governmental authorities, including sales and use taxes.
Under ASC 606 - Revenue from Contracts with Customers, the Company elected the practical expedient to recognize the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that the Company otherwise would have recognized is 12 months or less.
The Company recognizes revenue from the sale of emissions allowances allocated under the environmental programs in certain states. The Company has the right to payment when the allowances are sold at auction. Revenue is recognized on a point in time basis within the quarter that the auction is held. The revenues associated with the sale of these allowances are deferred as a component of the respective jurisdiction’s regulatory liability for environmental compliance. For more information on the Company’s regulatory assets and liabilities, see Note 9.
Disaggregation
In the following tables, revenue is disaggregated by the type of customer or service provided. The Company believes this level of disaggregation best depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. The table also includes a reconciliation of the disaggregated revenue by reportable segments. For more information on the Company's business segments, see Note 14.
Three Months Ended June 30, 2025ElectricNatural gas
distribution		PipelineOtherTotal
(In thousands)
Residential utility sales$28,569 $100,041 $— $— $128,610 
Commercial utility sales43,428 65,699 — — 109,127 
Industrial utility sales9,247 9,098 — — 18,345 
Other utility sales1,793 — — — 1,793 
Natural gas transportation— 15,814 46,120 — 61,934 
Natural gas storage— — 5,172 — 5,172 
Other17,123 11,626 4,977 179 33,905 
Intersegment eliminations(140)(92)(9,796)(180)(10,208)
Revenues from contracts with customers100,020 202,186 46,473 (1)348,678 
Other revenues(2,134)4,608 34 — 2,508 
Total external operating revenues$97,886 $206,794 $46,507 $(1)$351,186 
Three Months Ended June 30, 2024ElectricNatural gas
distribution		PipelineOtherTotal
(In thousands)
Residential utility sales$31,437 $106,690 $— $— $138,127 
Commercial utility sales41,620 64,274 — — 105,894 
Industrial utility sales11,758 9,268 — — 21,026 
Other utility sales2,065 — — — 2,065 
Natural gas transportation— 13,324 43,406 — 56,730 
Natural gas storage— — 5,331 — 5,331 
Other13,186 5,767 4,110 22 23,085 
Intersegment eliminations(48)(35)(9,035)(20)(9,138)
Revenues from contracts with customers100,018 199,288 43,812 2 343,120 
Other revenues(845)2,157 39 — 1,351 
Total external operating revenues$99,173 $201,445 $43,851 $2 $344,471 
Six Months Ended June 30, 2025ElectricNatural gas
distribution		PipelineOtherTotal
(In thousands)
Residential utility sales$68,254 $389,276 $— $457,530 
Commercial utility sales91,905 258,030 — 349,935 
Industrial utility sales18,411 24,560 — 42,971 
Other utility sales3,643 — — 3,643 
Natural gas transportation— 33,524 95,373 128,897 
Natural gas storage— — 11,202 11,202 
Other34,714 35,103 6,339 358 76,514 
Intersegment eliminations(318)(187)(43,132)(358)(43,995)
Revenues from contracts with customers216,609 740,306 69,782 — 1,026,697 
Other revenues
(6,462)5,735 49 (678)
Total external operating revenues$210,147 $746,041 $69,831 $— $1,026,019 
Six Months Ended June 30, 2024ElectricNatural gas
distribution		PipelineOtherTotal
(In thousands)
Residential utility sales$70,659 $369,793 $— $— $440,452 
Commercial utility sales83,135 226,404 — — 309,539 
Industrial utility sales23,107 23,847 — — 46,954 
Other utility sales4,001 — — — 4,001 
Natural gas transportation— 27,915 87,043 — 114,958 
Natural gas storage— — 10,713 — 10,713 
Other28,816 8,969 6,366 59 44,210 
Intersegment eliminations(60)(76)(39,325)(42)(39,503)
Revenues from contracts with customers209,658 656,852 64,797 17 931,324 
Revenues out of scope(2,742)4,078 86 — 1,422 
Total external operating revenues$206,916 $660,930 $64,883 $17 $932,746 
Remaining performance obligations
The remaining performance obligations at the pipeline segment include firm transportation and storage contracts with fixed pricing and fixed volumes. The Company has applied the practical expedient that does not require additional disclosures for contracts with an original duration of less than 12 months, to certain firm transportation, storage and non-regulated contracts. The Company's firm transportation and storage contracts included in the remaining performance obligations have weighted average remaining durations of less than five years and two years, respectively.
At June 30, 2025, the Company's remaining performance obligations were $573.3 million. The Company expects to recognize the following revenue amounts in future periods related to these remaining performance obligations: $87.0 million within the next 12 months or less; $83.0 million within the next 13 to 24 months; and $403.3 million in 25 months or more.