FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Carrying Value and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands |
Dec. 31, 2019 |
Dec. 31, 2018 |
---|---|---|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
Current portion of long-term debt | $ (13,750) | $ (13,750) |
Long-term debt, net | (3,121,572) | (2,245,548) |
Carrying Value | ||
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
Current portion of long-term debt | (13,750) | (13,750) |
Long-term debt, net | (3,121,572) | (2,245,548) |
Unamortized original issue discount and debt issuance costs | (404,700) | (88,900) |
Fair Value | ||
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
Current portion of long-term debt | (13,681) | (12,753) |
Long-term debt, net | $ (4,136,988) | $ (2,460,204) |