INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE - Assets and Liabilities Associated with MSC (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE
Current assets	$ 96,068	$ 85,026
Total assets	545,136	525,341
Current liabilities	(58,060)	(52,399)
Total liabilities	(146,811)	$ (135,400)
Balance excluding FV increments | Minera Santa Cruz S.A.
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE
Current assets	89,774
Total assets	197,130
Current liabilities	(57,912)
Total liabilities	(90,203)
Adjustments | Minera Santa Cruz S.A.
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE
Current assets	1,151
Total assets	84,120
Total liabilities	(1,622)
Balance including FV increments | Minera Santa Cruz S.A.
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE
Current assets	90,925
Total assets	281,250
Current liabilities	(57,912)
Total liabilities	$ (91,825)