Receivables and allowance for expected credit losses (Tables)

9 Months Ended

Sep. 30, 2025

Credit Loss [Abstract]

Schedule of Accounts Receivable, Allowance for Credit Loss

Details of the Company's expected credit losses were as follows:

	Electric		Natural gas distribution		Pipeline		Total
	(In thousands)
At December 31, 2024	$	473	$	1,366	$	—	$	1,839
Current expected credit loss provision	939		2,213		—		3,152
Less write-offs charged against the allowance	1,036		1,269		—		2,305
Credit loss recoveries collected	166		252		—		418
At March 31, 2025	$	542	$	2,562	$	—	$	3,104
Current expected credit loss provision	178		(151)		—		27
Less write-offs charged against the allowance	333		1,002		—		1,335
Credit loss recoveries collected	74		165		—		239
At June 30, 2025	$	461	$	1,574	$	—	$	2,035
Current expected credit loss provision	646		1,579		—		2,225
Less write-offs charged against the allowance	688		2,454		—		3,142
Credit loss recoveries collected	76		220		—		296
At September 30, 2025	$	495	$	919	$	—	$	1,414

	Electric		Natural gas distribution		Pipeline		Total
	(In thousands)
At December 31, 2023	$	414	$	1,189	$	—	$	1,603
Current expected credit loss provision	782		1,916		—		2,698
Less write-offs charged against the allowance	659		1,455		—		2,114
Credit loss recoveries collected	147		314		—		461
At March 31, 2024	$	684	$	1,964	$	—	$	2,648
Current expected credit loss provision	190		215		—		405
Less write-offs charged against the allowance	463		969		—		1,432
Credit loss recoveries collected	80		196		—		276
At June 30, 2024	$	491	$	1,406	$	—	$	1,897
Current expected credit loss provision	520		1,330		—		1,850
Less write-offs charged against the allowance	594		2,121		—		2,715
Credit loss recoveries collected	86		255		—		341
At September 30, 2024	$	503	$	870	$	—	$	1,373