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Cash Flow Information (Tables)
 12 Months Ended
Dec. 31, 2025
Supplemental Cash Flow Information [Abstract]  
Schedule of Cash Flow Information
Cash expenditures for interest and income taxes for the years ended December 31 were as follows:
202520242023
(In thousands)
Interest paid, net
$78,780 $56,916 $54,925 
Income taxes paid, net$41,765 $62,181 $76,689 
Noncash investing and financing transactions at December 31 were as follows:
202520242023
(In thousands)
Property, plant and equipment additions in accounts payable$25,840 $22,167 $12,672 
Right-of-use assets obtained in exchange for new operating lease liabilities$15,811 $20,777 $14,967 
Equity contribution from Centennial related to the Separation
$— $— $64,724 
Equity contribution to MDU Resources for asset/liability transfers related to the Separation
$— $— $(1,537)
MDU Resources’ stock issued in connection with a business combination
$— $— $383 
Accrual for holdback payment related to a business combination$5,686 $— $— 
The following table provides cash taxes paid (net of refunds) for the year end December 31 were as follows:
Jurisdiction20252024
(In thousands)
Federal$26,500 $40,736 
Oregon6,350 7,229 
Minnesota
1,300 4,396 
Other States/Cities7,615 9,820 
Total$41,765 $62,181