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FAIR VALUE MEASUREMENTS - Fair Value Measurements and Fair Value Hierarchy for Assets and Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Life-insurance contracts $ 20,151 $ 18,510
Mutual funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Mutual funds 14,273 11,735
Commodity swap contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Commodity swap contracts 122 466
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Life-insurance contracts 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mutual funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Mutual funds 14,273 11,735
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commodity swap contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Commodity swap contracts 0 0
Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Life-insurance contracts 20,151 18,510
Significant Other Observable Inputs (Level 2) | Mutual funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Mutual funds 0 0
Significant Other Observable Inputs (Level 2) | Commodity swap contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Commodity swap contracts 122 466
Significant Unobservable Inputs (Level 3)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Life-insurance contracts 0 0
Significant Unobservable Inputs (Level 3) | Mutual funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Mutual funds 0 0
Significant Unobservable Inputs (Level 3) | Commodity swap contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Commodity swap contracts $ 0 $ 0