Quarterly report pursuant to Section 13 or 15(d)

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

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EQUITY INVESMENTS (Equity Investments Balance Sheet Disclosure) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Equity Method Investments and Joint Ventures [Abstract]    
Current assets $ 516,169 $ 471,733
Noncurrent assets 1,363,785 1,302,488
Current liabilities 188,896 239,975
Noncurrent liabilities $ 215,093 $ 94,575