CONVERTIBLE NOTES AND CREDIT FACILITY - Credit Facility Narrative (Details) - Line of Credit $ in Millions	6 Months Ended
Jun. 30, 2020 USD ($)
Revolving Credit Facility
Debt Instrument [Line Items]
Repayments of debt	$ 12.8
Letter of Credit
Debt Instrument [Line Items]
Collateral amount	$ 2.0

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

Name:	us-gaap_RepaymentsOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration