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RESTATEMENT OF PREVIOUSLY ISSUED CONSOLIDATED FINANCIAL STATEMENTS (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2019
Description of Restatement Adjustments [Abstract] |  |  |  |  |  |
Common stock, shares issued (in shares) |  |  | (10,353,155) | [1] |  | (10,354,563)
Treasury stock, shares (in shares) |  |  | (1,292,594) | [1] |  | (1,422,339)
Restatement Adjustment [Member] |  |  |  |  |  |
Description of Restatement Adjustments [Abstract] |  |  |  |  |  |
Common stock, shares issued (in shares) |  |  |  |  |  | (993,623)
Treasury stock, shares (in shares) |  |  |  |  |  | (993,623)
Restatement Adjustment [Member] | Restatement Income Taxes [Member] |  |  |  |  |  |
Description of Restatement Adjustments [Abstract] |  |  |  |  |  |
Increase (decrease) to income tax expense |  |  | $ 0.6 |  | $ (0.2) |
Increase (decrease) to income tax expense for correction |  |  | (0.5) |  | 1.3 |
Increase (decrease) to income tax expense for correction of smaller adjustments |  |  | (0.4) |  | (0.9) |
Increase (decrease) to income tax expense for correction of income earned from wholly-owned foreign subsidiaries |  |  | $ (0.1) |  | (0.2) |
Interest expense related to other corrections |  |  |  |  | $ (0.2) |
Income tax expense (benefit) related to correction of tax related misstatements |  | $ 0.1 |  |  |  |
Restatement Adjustment [Member] | Restatement Income Taxes [Member] | Maximum [Member] |  |  |  |  |  |
Description of Restatement Adjustments [Abstract] |  |  |  |  |  |
Tax expense (benefit) related to pre-tax restatement adjustments | $ (0.1) | $ (0.1) |  |  |  |
Income tax expense (benefit) related to correction of tax related misstatements | $ 0.1 |  |  |  |  |
[1] | As described in Note 2 to these Consolidated Financial Statements, we have restated the Consolidated Financial Statements.

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