REVENUE FROM CONTRACTS WITH CUSTOMERS Narrative (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | 15 Months Ended | |||
|---|---|---|---|---|---|---|
Sep. 30, 2018 |
Jun. 30, 2018 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2019 |
|
| Revenue recognized | $ 61,646 | $ 77,466 | $ 57,826 | |||
| Additions to contract liability | $ (69,830) | $ (52,957) | $ (83,243) | |||
| Revenue recognized due to change in contract liability | $ 9,000 | |||||
| Unnamed Customer [Member] | ||||||
| Revenue recognized | $ 37,500 | |||||
| Additions to contract liability | $ (37,500) | |||||