SELF-INSURANCE (Details) $ in Thousands	Sep. 30, 2024 USD ($) item	Dec. 31, 2023 USD ($) item	Sep. 30, 2023 USD ($)
Self Insurance [Line Items]
Total lease liability	$ 657	$ 712
Restricted cash	$ 5,812	$ 4,281	$ 4,143
Mining Properties and Mineral Rights [Member]
Self Insurance [Line Items]
Number of mining units | item	4	7
Geographic spread of mining units (in miles) | item	7	11
Total lease liability	$ 247,300	$ 262,000
Future Workers' Compensation Claim Payments [Member]
Self Insurance [Line Items]
Restricted cash		$ 4,300