Revenue from contracts with customers (Tables)

9 Months Ended

Sep. 30, 2025

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of revenue

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 15.

Three Months Ended September 30, 2025	Electric		Natural gas distribution		Pipeline		Other		Total
	(In thousands)
Residential utility sales	$	35,730	$	64,225	$	—	$	—	$	99,955
Commercial utility sales	52,492		45,581		—		—		98,073
Industrial utility sales	9,525		7,873		—		—		17,398
Other utility sales	1,949		—		—		—		1,949
Natural gas transportation	—		16,292		47,239		—		63,531
Natural gas storage	—		—		5,680		—		5,680
Other	19,118		7,983		4,439		182		31,722
Intersegment eliminations	(138)		(92)		(4,269)		(182)		(4,681)
Revenues from contracts with customers	118,676		141,862		53,089		—		313,627
Other revenues	(1,014)		2,353		70		—		1,409
Total external operating revenues	$	117,662	$	144,215	$	53,159	$	—	$	315,036

Three Months Ended September 30, 2024	Electric		Natural gas distribution		Pipeline		Other		Total
	(In thousands)
Residential utility sales	$	37,076	$	61,928	$	—	$	—	$	99,004
Commercial utility sales	46,648		37,687		—		—		84,335
Industrial utility sales	9,702		6,869		—		—		16,571
Other utility sales	2,045		—		—		—		2,045
Natural gas transportation	—		15,279		41,936		—		57,215
Natural gas storage	—		—		6,053		—		6,053
Other	16,182		9,736		3,537		22		29,477
Intersegment eliminations	(12)		(31)		(3,924)		(21)		(3,988)
Revenues from contracts with customers	111,641		131,468		47,602		1		290,712
Other revenues	(3,173)		2,122		33		—		(1,018)
Total external operating revenues	$	108,468	$	133,590	$	47,635	$	1	$	289,694

Nine Months Ended September 30, 2025	Electric		Natural gas distribution		Pipeline		Other		Total
	(In thousands)
Residential utility sales	$	103,984	$	453,501	$	—	$	—	$	557,485
Commercial utility sales	144,397		303,611		—		—		448,008
Industrial utility sales	27,936		32,433		—		—		60,369
Other utility sales	5,592		—		—		—		5,592
Natural gas transportation	—		49,816		142,612		—		192,428
Natural gas storage	—		—		16,882		—		16,882
Other	53,832		43,086		10,778		540		108,236
Intersegment eliminations	(457)		(278)		(47,401)		(540)		(48,676)
Revenues from contracts with customers	335,284		882,169		122,871		—		1,340,324
Other revenues	(7,476)		8,088		119		—		731
Total external operating revenues	$	327,808	$	890,257	$	122,990	$	—	$	1,341,055

Nine Months Ended September 30, 2024	Electric		Natural gas distribution		Pipeline		Other		Total
	(In thousands)
Residential utility sales	$	107,735	$	431,721	$	—	$	—	$	539,456
Commercial utility sales	129,783		264,091		—		—		393,874
Industrial utility sales	32,809		30,716		—		—		63,525
Other utility sales	6,046		—		—		—		6,046
Natural gas transportation	—		43,194		128,979		—		172,173
Natural gas storage	—		—		16,766		—		16,766
Other	44,998		18,705		9,903		82		73,688
Intersegment eliminations	(71)		(108)		(43,249)		(64)		(43,492)
Revenues from contracts with customers	321,300		788,319		112,399		18		1,222,036
Revenues out of scope	(5,915)		6,200		119		—		404
Total external operating revenues	$	315,385	$	794,519	$	112,518	$	18	$	1,222,440