Quarterly report pursuant to Section 13 or 15(d)

LONG-TERM DEBT (Future Maturities of Long-Term Debt) (Details)

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LONG-TERM DEBT (Future Maturities of Long-Term Debt) (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Maturities of Long-term Debt [Abstract]    
April 1 - December 31, 2018 $ 118,652  
2019 41,261  
2020 72,281  
2021 122,917  
2022 819,189  
Thereafter 1,804,291  
Total $ 2,978,591 $ 2,337,992