COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2019	Dec. 31, 2018
Loss Contingencies [Line Items]
Amounts not yet paid to FI		$ 9.3
FI share, expense	$ 4.6
Non-cash gain on financial institution share	3.5
Financial Institution Share Commitment
Loss Contingencies [Line Items]
FI share commitment	$ 10.0

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

No definition available.

Name:	us-gaap_OtherCommitment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant