LONG-TERM DEBT - Subsidiary Guarantees (Details) - Minimum	Dec. 31, 2018
Long-Term Debt
Subsidiary guarantors' percentage of revenue	90.00%
Subsidiary guarantors' percentage of assets	90.00%

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.

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration