SEGMENT INFORMATION (Details)	3 Months Ended	9 Months Ended
Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) area segment	Sep. 30, 2018 USD ($)
Segment Reporting [Abstract]
Number of reportable segments \| segment			2
Number of service areas \| area			3
Significant items reported in the other segment \| $	$ 0	$ 0	$ 0	$ 0

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration