XML 71 R60.htm IDEA: XBRL DOCUMENT v3.23.3
OTHER INCOME (EXPENSE) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Other Income and Expenses [Abstract]        
Interest income $ 6,098 $ 5,344 $ 21,015 $ 9,143
Gain (loss) on investments and on marketable security sales 8,437 5,940 19,839 11,527
Change in fair value of marketable securities (555) (37) 565 (3,836)
Gain (loss) on sale of mineral properties, plant, and equipment (560) (501) (1,610) (1,842)
Other (2,042) (1,593) (3,010) (8,603)
Total $ 11,378 $ 9,153 $ 36,799 $ 6,389