REVENUE - Summary of the allowance for doubtful accounts activity (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Allowance for doubtful accounts activity | ||
| Balance at beginning of year | $ 38,075 | $ 15,293 |
| Bad debt expense | 31,117 | 26,433 |
| Deductions | (3,772) | (3,651) |
| Balance at end of year | $ 65,420 | $ 38,075 |
| X | ||||||||||
- Definition Amount of decrease in allowance for credit loss on accounts receivable. No definition available.
|
| X | ||||||||||
- Definition Amount of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|