| COMMITMENTS AND CONTINGENCIES (Details) $ in Millions | 6 Months Ended | 
|---|---|
| Jun. 30, 2021  USD ($) | |
| Loss Contingencies | |
| Operating lease not yet commenced | $ 19.0 | 
| Operating lease term (in years) | 10 years | 
| Cumulative preferred stock unpaid and in arrears | $ 5.6 | 
| Lower Range | |
| Loss Contingencies | |
| Operating leases commence (in months) | 12 months | 
| Upper Range | |
| Loss Contingencies | |
| Operating leases commence (in months) | 24 months | 
| Operating lease term (in years) | 15 years | 
| X | ||||||||||
| 
- Definition Term of lessee's operating lease not yet commenced, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
 | 
| X | ||||||||||
| 
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
 | 
| X | ||||||||||
| 
- Definition Amount lessor expects from underlying asset following end of operating lease term for lease that has not yet commenced. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
 | 
| X | ||||||||||
| 
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
 | 
| X | ||||||||||
| 
- Definition Aggregate amount of cumulative preferred dividends in arrears. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
 | 
| X | ||||||||||
| 
- Details 
 | 
| X | ||||||||||
| 
- Details 
 |