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EQUITY INVESTMENTS (Equity Investments Balance Sheet Disclosure) (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]    
Current assets $ 440,801 $ 421,326
Noncurrent assets 1,104,297 1,260,075
Current liabilities 131,175 132,569
Noncurrent liabilities $ 171,132 $ 163,241