REGULATORY ASSETS AND LIABILITIES (Tables)

3 Months Ended

Mar. 31, 2024

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, 2024
	Remaining Recovery Period	Current		Noncurrent		Total
		(Thousands of dollars)
Winter weather event costs	(a)	$	17,390	$	17,433	$	34,823
Under-recovered purchased-gas costs	1 year	29,465		—		29,465
Pension and postemployment benefit costs	See Note 9	1,601		229,014		230,615
Reacquired debt costs	6 years	723		2,531		3,254
MGP remediation costs	15 years	98		30,387		30,485
Ad-valorem tax	1 year	12,085		—		12,085
WNA	1 year	16,207		—		16,207
Customer credit deferrals	1 year	12,833		1,177		14,010
Other	1 to 18 years	4,290		3,309		7,599
Total regulatory assets, net of amortization		94,692		283,851		378,543
Income tax rate changes	(a)	—		(487,475)		(487,475)
Over-recovered purchased-gas costs	1 year	(34,844)		—		(34,844)
Total regulatory liabilities		(34,844)		(487,475)		(522,319)
Net regulatory assets and liabilities		$	59,848	$	(203,624)	$	(143,776)
(a) Recovery period varies by jurisdiction. See discussion below for additional information regarding our regulatory assets related to winter weather event costs and regulatory liabilities related to federal income tax rate changes.

		December 31, 2023
	Remaining Recovery Period	Current		Noncurrent		Total
		(Thousands of dollars)
Winter weather event costs	(a)	$	22,633	$	21,495	$	44,128
Under-recovered purchased-gas costs	1 year	10,391		—		10,391
Pension and postemployment benefit costs	See Note 9	6,379		228,092		234,471
Reacquired debt costs	6 years	723		2,712		3,435
MGP remediation costs	15 years	98		31,893		31,991
Ad-valorem tax	1 year	14,533		—		14,533
WNA	1 year	11,404		—		11,404
Customer credit deferrals	1 year	6,184		—		6,184
Other	1 to 18 years	2,963		3,714		6,677
Total regulatory assets, net of amortization		75,308		287,906		363,214
Income tax rate changes	(a)	—		(500,478)		(500,478)
Over-recovered purchased-gas costs	1 year	(66,901)		—		(66,901)
Total regulatory liabilities		(66,901)		(500,478)		(567,379)
Net regulatory assets and liabilities		$	8,407	$	(212,572)	$	(204,165)
(a) Recovery period varies by jurisdiction. See discussion below for additional information regarding our regulatory assets related to winter weather event costs and regulatory liabilities related to federal income tax rate changes.