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