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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 |  |  |

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