SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) shares in Thousands, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2017 USD ($) segment store shares	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 USD ($) shares	Mar. 31, 2017 USD ($)
Accounting Policies [Abstract]
Number of reportable segments | segment		2
Advertising Costs
Advertising expense		$ 67.0	$ 71.4	$ 74.4
Vendor consideration		5.8	$ 6.4	$ 20.2
Discrete tax benefit recognized for excess tax benefits		$ 0.8
Net Income (Loss) Per Common Share
Stock options and restricted stock awards securities excluded from computation of earnings (loss) per share (in shares) | shares		40	1,300	1,000
Employee Benefit Plans
Minimum annual contribution per employee		1.00%
Aggregate expense in contribution plans		$ 0.7	$ 0.4	$ 0.9
Fair Value Measurements
Weighted average interest rate on short-term borrowings	4.70%	4.70%	4.70%	4.30%
Supplier Concentration Risk | Vendor One
Fair Value Measurements
Concentration risk		16.00%	13.60%	11.20%
Supplier Concentration Risk | Vendor Two
Fair Value Measurements
Concentration risk		12.00%		11.10%
SARL Business Segment
Segment Reporting Information [Line Items]
Percentage of residual equity position retained		5.00%
ETG
Evaluation of Long-lived Assets
Impairment charge on long-lived assets			$ 1.7
Goodwill and Intangible Assets
Intangible asset impairment charges	$ 0.3
Advertising Costs
Advertising expense		$ 0.6	2.5	$ 2.5
Vendor consideration		(0.4)	(2.6)	(3.3)
NATG
Advertising Costs
Advertising expense		0.3	1.5	7.5
Vendor consideration			0.9	(12.1)
Employee Benefit Plans
Aggregate expense in contribution plans		$ 0.0	0.0	0.4
IPG
Goodwill and Intangible Assets
Intangible asset impairment charges	$ 0.1
Minimum
Advertising Costs
Amortization period		1 month
Maximum
Advertising Costs
Amortization period		4 months
Furniture, Fixtures and Equipment | Minimum
Segment Reporting Information [Line Items]
Estimated useful lives		3 years
Furniture, Fixtures and Equipment | Maximum
Segment Reporting Information [Line Items]
Estimated useful lives		10 years
Internal-Use Software
Segment Reporting Information [Line Items]
Estimated useful lives		3 years
SARL Business Segment
Segment Reporting Information [Line Items]
Notes receivable related to disposal of SARL segment		$ 2.2			$ 3.3
NATG
Segment Reporting Information [Line Items]
Number of remaining stores | store		3
Continuing Operations
Segment Reporting Information [Line Items]
Reclassification of component of cost of sales to SD&A		$ 21.8	$ 38.9	$ 34.0
Employee Stock Option
Net Income (Loss) Per Common Share
Shares included in the calculated of diluted earnings per share | shares		400
Restricted Stock
Net Income (Loss) Per Common Share
Shares included in the calculated of diluted earnings per share | shares		200