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Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
 10 Months Ended 12 Months Ended
Oct. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Product Information [Line Items]          
Advertising expenses   $ 1,500,000 $ 1,100,000 $ 900,000  
Selling, general and administrative expenses   189,338,000 149,544,000 131,375,000  
Other income, net       3,981,000  
Operating revenue   3,746,387,000 2,849,685,000 2,854,390,000  
Income from equity method investments   16,270,000 12,185,000 4,946,000  
Interest in assets of joint venture   0      
Investment in equity method investments   19,500,000 14,300,000    
Income from equity method investments   16,300,000 12,200,000 5,000,000.0  
Cash, cash equivalents and restricted cash   170,500,000 86,012,000 1,567,000 $ 2,112,000
Restricted cash   17,800,000 16,100,000    
Impairment of intangible assets, excluding goodwill   $ 0 0 0  
Minimum          
Product Information [Line Items]          
Performance measure target (as a percent)   0.00%      
Minimum | Various Joint Ventures          
Product Information [Line Items]          
Investment in joint venture (as a percent)   25.00%      
Maximum          
Product Information [Line Items]          
Performance measure target (as a percent)   200.00%      
Maximum | Various Joint Ventures          
Product Information [Line Items]          
Investment in joint venture (as a percent)   50.00%      
RSUs          
Product Information [Line Items]          
Award vesting period   3 years      
MDU Resources | RSUs          
Product Information [Line Items]          
Award vesting period 3 years        
Related party          
Product Information [Line Items]          
Other income, net   $ 0 0    
Related party | Allocated corporate expenses          
Product Information [Line Items]          
General corporate expenses     30,400,000 27,100,000  
Joint ventures          
Product Information [Line Items]          
Operating revenue     600,000 7,800,000  
Income from equity method investments     $ 200,000 $ 2,100,000