Quarterly report pursuant to Section 13 or 15(d)

EQUITY INVESTMENTS (Equity Investments Balance Sheet Disclosure) (Details)

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EQUITY INVESTMENTS (Equity Investments Balance Sheet Disclosure) (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]    
Current assets $ 473,532 $ 409,750
Current liabilities 610,666 510,287
Noncurrent liabilities 43,267 36,604
Equity Method Investment, Nonconsolidated Investee or Group of Investees    
Schedule of Equity Method Investments [Line Items]    
Current assets 462,478 483,303
Noncurrent assets 1,079,557 1,092,495
Current liabilities 125,359 132,978
Noncurrent liabilities $ 124,628 $ 148,240