v3.25.2
REGULATORY ASSETS AND LIABILITIES (Tables)
 6 Months Ended
Jun. 30, 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:

June 30, 2025
CurrentNoncurrentTotal
(Thousands of dollars)
Winter weather event costs$— $979 $979 
Under-recovered purchased-gas costs19,286 — 19,286 
Pension and postemployment benefit costs, net1,358 224,820 226,178 
Reacquired debt costs723 1,627 2,350 
MGP remediation costs1,000 29,567 30,567 
Ad-valorem tax4,705 — 4,705 
WNA14,098 — 14,098 
Customer credit deferrals8,374 1,138 9,512 
Other, net6,473 (4,061)2,412 
Total regulatory assets56,017 254,070 310,087 
Income tax rate changes— (454,458)(454,458)
Over-recovered purchased-gas costs(66,959)— (66,959)
Total regulatory liabilities(66,959)(454,458)(521,417)
Net regulatory assets and liabilities$(10,942)$(200,388)$(211,330)

December 31, 2024
CurrentNoncurrentTotal
(Thousands of dollars)
Winter weather event costs$9,051 $15,938 $24,989 
Under-recovered purchased-gas costs43,819 — 43,819 
Pension and postemployment benefit costs, net1,358 224,837 226,195 
Reacquired debt costs723 1,989 2,712 
MGP remediation costs1,000 30,067 31,067 
Ad-valorem tax14,066 — 14,066 
WNA26,684 — 26,684 
Customer credit deferrals255 3,639 3,894 
Other, net4,254 1,536 5,790 
Total regulatory assets101,210 278,006 379,216 
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)