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GOODWILL AND INTANGIBLES - Definite Lived Intangible Assets (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Aug. 31, 2018
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | $ 6.2 | $ 6.2 |
Accumulated Amortization | 4.7 | 1.8 |
Net Book Value | $ 1.5 | $ 4.4 |
Weighted avg useful life | 5 years 2 months 12 days | 4 years 9 months 18 days |
French Business Unit |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-lived intangible assets, transfer to discontinued operations |  |  | $ 0.3
Finite-lived intangible assets, amortization, transfer to discontinued operations |  | $ 0.3 |
Client lists |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | $ 2.0 | 2.0 |
Accumulated Amortization | 0.8 | 0.6 |
Net Book Value | $ 1.2 | $ 1.4 |
Weighted avg useful life | 6 years 1 month 6 days | 7 years |
Client lists | Minimum Years |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Amortization Period (Years) | 5 years | 5 years |
Client lists | Maximum Years |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Amortization Period (Years) | 10 years | 10 years |
Leases |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | $ 0.8 | $ 0.8 |
Accumulated Amortization | 0.5 | 0.4 |
Net Book Value | $ 0.3 | $ 0.4 |
Weighted avg useful life | 1 year 10 months 24 days | 3 years 1 month 6 days |
Leases | Minimum Years |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Amortization Period (Years) | 3 years | 3 years |
Leases | Maximum Years |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Amortization Period (Years) | 6 years | 6 years |
Domain name |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Amortization Period (Years) | 5 years | 5 years |
Gross Carrying Amount | $ 3.4 | $ 3.4 |
Accumulated Amortization | 3.4 | 0.8 |
Net Book Value | $ 0.0 | $ 2.6 |
Weighted avg useful life | 0 years | 3 years 9 months 18 days |

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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