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OPERATING SEGMENT REPORTING - Geographic information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Segment Reporting
Long-lived Assets	$ 447,066				$ 440,316				$ 447,066	$ 440,316
Revenue	28,240	$ 25,988	$ 30,647	$ 25,542	34,966	$ 37,129	$ 40,706	$ 23,740	110,417	136,541	$ 104,789
Company's ROU office lease asset	300				400				300	400
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	93,451				90,961				93,451	90,961
Minera Santa Cruz S.A.
Operating Segment Reporting
Revenue									254,698	271,863	219,020
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	93,451				90,961				93,451	90,961	108,326
Bank of Nova Scotia
Operating Segment Reporting
Revenue											33,060
Asahi Refining Inc.
Operating Segment Reporting
Revenue									57,835	134,395	66,934
UNITED STATES
Operating Segment Reporting
Long-lived Assets	70,577				37,878				70,577	37,878
Revenue									47,926	79,205	48,884
Canada
Operating Segment Reporting
Long-lived Assets	91,552				93,294				91,552	93,294
Revenue									60,848	50,704	41,452
MEXICO
Operating Segment Reporting
Long-lived Assets	29,219				26,561				29,219	26,561
Revenue									1,643	6,632	$ 14,453
ARGENTINA
Operating Segment Reporting
Long-lived Assets	255,718				282,583				255,718	282,583
ARGENTINA | Minera Santa Cruz S.A.
Operating Segment Reporting
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 93,500				$ 90,900				$ 93,500	$ 90,900

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Amount of lessee's right to use underlying asset under operating lease for the office lease asset.

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Amount of investment in equity method investee and investment in and advance to affiliate.

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Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

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