REGULATORY ASSETS AND LIABILITIES (Tables)

3 Months Ended

Mar. 31, 2025

SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items]

SCHEDULE OF REGULATED ASSETS AND LIABILITIES

The tables below present a summary of regulatory assets and liabilities, net of amortization, for the periods indicated:

	March 31, 2025
	Current		Noncurrent		Total
	(Thousands of dollars)
Winter weather event costs	$	—	$	979	$	979
Under-recovered purchased-gas costs	7,049		—		7,049
Pension and postemployment benefit costs, net	1,358		224,860		226,218
Reacquired debt costs	723		1,808		2,531
MGP remediation costs	1,000		29,817		30,817
Ad-valorem tax	7,086		—		7,086
WNA	10,938		—		10,938
Customer credit deferrals	—		11,052		11,052
Other, net	8,384		65		8,449
Total regulatory assets	36,538		268,581		305,119
Income tax rate changes	—		(457,126)		(457,126)
Over-recovered purchased-gas costs	(39,665)		—		(39,665)
Total regulatory liabilities	(39,665)		(457,126)		(496,791)
Net regulatory assets and liabilities	$	(3,127)	$	(188,545)	$	(191,672)

	December 31, 2024
	Current		Noncurrent		Total
	(Thousands of dollars)
Winter weather event costs	$	9,051	$	15,938	$	24,989
Under-recovered purchased-gas costs	43,819		—		43,819
Pension and postemployment benefit costs, net	1,358		224,837		226,195
Reacquired debt costs	723		1,989		2,712
MGP remediation costs	1,000		30,067		31,067
Ad-valorem tax	14,066		—		14,066
WNA	26,684		—		26,684
Customer credit deferrals	255		3,639		3,894
Other, net	4,254		1,536		5,790
Total regulatory assets	101,210		278,006		379,216
Income tax rate changes	—		(467,563)		(467,563)
Over-recovered purchased-gas costs	(22,525)		—		(22,525)
Total regulatory liabilities	(22,525)		(467,563)		(490,088)
Net regulatory assets and liabilities	$	78,685	$	(189,557)	$	(110,872)