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Description of Business (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Jun. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Asset impairment charges $ 323,398   $ 0 $ 350,939 $ 248
Chile | Peru          
Asset impairment charges   $ 418,000