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SIGNIFICANT ACCOUNTING POLICIES - Remedial Liabilities (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Regulatory Liabilities [Line Items]      
Accrual for environmental loss contingencies $ 95,369 $ 111,745 $ 111,243
Minimum      
Regulatory Liabilities [Line Items]      
Remedial liabilities at acquisition, risk-free interest rate (as a percent) 1.37%    
Maximum      
Regulatory Liabilities [Line Items]      
Remedial liabilities at acquisition, risk-free interest rate (as a percent) 4.90%