SELF INSURANCE (Details) $ in Thousands	Mar. 31, 2025 USD ($) item	Dec. 31, 2024 USD ($) item	Mar. 31, 2024 USD ($)
Self Insurance [Line Items]
Maximum liability per workers' compensation claim	$ 1,000
Maximum annual liability for workers' compensation claims	4,000
Workers' compensation claims restricted cash	9,316	$ 4,921	$ 4,737
Workers' compensation reserve	$ 4,800	$ 4,300
Mining Properties and Mineral Rights [Member]
Self Insurance [Line Items]
Number of mining units | item	4	4
Geographic spread of mining units (in miles) | item	7	7
Total operating lease liability	$ 160,800	$ 227,800
Future Workers' Compensation Claim Payments [Member]
Self Insurance [Line Items]
Workers' compensation claims restricted cash	$ 3,300	$ 3,400