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REVENUE (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Revenue from Contract with Customer [Abstract] |  |  |  |  |  |  |  |  |  |  |
Contract with Customer, Refund Liability | $ 1.8 |  |  |  |  |  |  |  | $ 1.8 |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Performance obligation, timing of satisfaction |  |  |  |  |  |  |  |  | The Company's standard terms, provided on its invoices as well as on its websites, are included in communications with the customer and have standard payment terms of 30 days. Certain customers may have extended payment terms that have been pre-approved by the Company's credit department, but generally none extend longer than 120 days. |  |
Net sales | $ 217.7 | $ 235.8 | $ 231.2 | $ 212.2 | $ 194.5 | $ 204.4 | $ 202.7 | $ 190.2 | $ 896.9 | $ 791.8 | $ 753.1
Reportable Geographical Components | United States |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 854.6 | 759.4 | 692.3
Reportable Geographical Components | Germany |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 33.9
Reportable Geographical Components | MRO Products Industrial Supplies | United States |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 854.6 | 759.4 | 692.3
Reportable Geographical Components | MRO Products Industrial Supplies | Canada |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 42.3 | $ 32.4 | $ 26.9

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