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Income Taxes - Reconciliation of Tax Rate (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 28, 2025
Dec. 29, 2024
Dec. 31, 2023
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]      
U.S. Federal statutory income tax rate $ 3,063    
State income tax, net 1,132    
Effect of Cross-Border Tax Laws - Canada      
Effect of Cross-Border Tax Laws - Canada (GILTI) 1,986    
Nontaxable or Nondeductible Items      
Meals and entertainment expenses 3,820    
Company-owned life insurance (764)    
Executive compensation limitations 934    
Stock-based compensation 170    
Transaction costs 424    
Changes in Uncertain Tax Positions (510)    
Other nontaxable or nondeductible items 244    
Other Adjustments      
Allocation of tax assets from Southwest Gas Holdings (20,861)    
Southwest Gas Holdings settlement true-up 180    
Return to provision 278    
Other 53    
Income tax (benefit) expense $ (8,063) $ 3,466 $ 9,530
Increases (decreases) resulting from:      
Federal statutory income tax rate 21.00% 21.00% 21.00%
State income tax, net 7.80% 13.30% (0.60%)
Effect of Cross-Border Tax Laws - Canada      
Effect of Cross-Border Tax Laws - Canada (GILTI) 13.60%    
Nontaxable or Nondeductible Items      
Meals and entertainment expenses 26.20% (86.50%) (1.90%)
Company-owned life insurance (0.052)    
Executive compensation limitations 6.40% (30.20%) 0.00%
Stock-based compensation 1.20% (1.90%) 0.00%
Transaction costs 0.029    
Uncertain tax positions (3.50%) (1.10%) 0.00%
Other nontaxable or nondeductible items 1.70%    
Other Adjustments      
Allocation of tax assets from Southwest Gas Holdings (1.430)    
Southwest Gas Holdings settlement true-up 1.20%    
Return to provision 1.90% 12.60% (0.60%)
Other 0.30% (0.90%) 0.00%
Consolidated effective income tax rate (55.30%) (103.30%) (5.40%)
CANADA      
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Statutory differences between Canada and United States $ 1,754    
Other $ 34    
Increases (decreases) resulting from:      
Statutory differences between Canada and United States 12.00% (28.10%) (0.60%)
Other 0.20%