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GOODWILL AND INTANGIBLES - Definite Lived Intangible Assets (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 6.5 | $ 6.5
Accumulated Amortization | 2.1 | 1.1
Net Book Value | $ 4.4 | $ 5.4
Weighted avg useful life | 4 years 9 months 18 days | 5 years 8 months 12 days
Indefinite-lived intangible assets transferred out of definite lived | $ 1.8 | $ 0.0
SARL Business Segment |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite lived intangible assets transferred to discontinued operations | 0.4 |
Client lists |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 2.3 | 2.3
Accumulated Amortization | 0.9 | 0.6
Net Book Value | $ 1.4 | $ 1.7
Weighted avg useful life | 7 years | 8 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 | 0.4 | 0.3
Net Book Value | $ 0.4 | $ 0.5
Weighted avg useful life | 3 years 1 month 6 days | 4 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 | 0.8 | 0.2
Net Book Value | $ 2.6 | $ 3.2
Weighted avg useful life | 3 years 9 months 18 days | 4 years 9 months 18 days

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- Definition Finite-lived Intangible Assets, Transfer to Discontinued Operations + References No definition available. + Details
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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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- Definition Weighted average period before the next renewal or extension (both explicit and implicit) for intangible assets that have been renewed or extended, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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