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Fair Value Measurements - Recurring Fair Value Measurements (Details) - USD ($)
Dec. 31, 2024
Dec. 31, 2023
ASSETS:    
TOTAL $ 12,700,000 $ 19,900,000
LIABILITIES:    
TOTAL 4,400,000 7,900,000
Fair Value, Recurring    
ASSETS:    
Cash equivalents 7,900,000 16,800,000
Trust assets 300,000 200,000
Derivative instruments 4,500,000 2,900,000
LIABILITIES:    
Derivative instruments 4,400,000 7,900,000
Level 1    
ASSETS:    
TOTAL 8,200,000 17,000,000.0
LIABILITIES:    
TOTAL 0 0
Level 1 | Fair Value, Recurring    
ASSETS:    
Cash equivalents 7,900,000 16,800,000
Trust assets 300,000 200,000
Derivative instruments 0 0
LIABILITIES:    
Derivative instruments 0 0
Level 2    
ASSETS:    
TOTAL 4,500,000 2,900,000
LIABILITIES:    
TOTAL 4,400,000 7,900,000
Level 2 | Fair Value, Recurring    
ASSETS:    
Cash equivalents 0 0
Trust assets 0 0
Derivative instruments 4,500,000 2,900,000
LIABILITIES:    
Derivative instruments 4,400,000 7,900,000
Level 3    
ASSETS:    
TOTAL 0 0
LIABILITIES:    
TOTAL 0 0
Level 3 | Fair Value, Recurring    
ASSETS:    
Cash equivalents 0 0
Trust assets 0 0
Derivative instruments 0 0
LIABILITIES:    
Derivative instruments $ 0 $ 0