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LONG-TERM DEBT - Finance Costs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
LONG-TERM DEBT    
Interest on Notes $ 64,481 $ 72,795
Stand-by fees on credit facilities 3,859 5,546
Amortization of credit facilities financing and note issuance costs 3,042 3,778
Interest on Credit Facility 536 1,549
Accretion expense on reclamation provisions 15,951 6,554
Interest on lease obligations, other interest and penalties (1,290) 5,329
Interest capitalized to assets under construction (3,644) (3,509)
Total finance costs $ 82,935 $ 92,042
Capitalization rate (as a percent) 1.16% 1.20%