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STOCK-BASED COMPENSATION - Narrative (Details) $ / shares in Units, $ in Millions | 6 Months Ended
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Jun. 30, 2020 USD ($) plan $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Share-based compensation arrangement by share-based payment award, number of plans | plan | 2
Grants in period, net of forfeitures (in shares) | shares | 348,587
Options, weighted average grant date fair value (in dollars per share) | $ / shares | $ 13.03
Stock Options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Total unrecognized compensation costs | $ | $ 6.9
Weighted-average period for cost recognition | 3 years
Stock Options | Directors |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Stock options exercisable, vesting period | 1 year
Stock Options | Employees |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Expiration period | 8 years
Restricted Stock |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Stock options exercisable, vesting period | 3 years
Total unrecognized compensation costs | $ | $ 32.9
Weighted-average period for cost recognition | 2 years
Awards granted during the period (in shares) | shares | 312,323
Other than options, weighted average grant date fair value (in dollars per share) | $ / shares | $ 44.04
Performance Stock and Restricted Stock Awards |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Requisite service periods of awards | 3 years
Performance Stock |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Awards granted during the period (in shares) | shares | 180,875
Other than options, weighted average grant date fair value (in dollars per share) | $ / shares | $ 43.39
Minimum | Stock Options | Directors and Certain Executive Officers |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Expiration period | 6 years
Maximum | Stock Options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Stock options exercisable, vesting period | 4 years
Maximum | Stock Options | Directors and Certain Executive Officers |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Expiration period | 10 years

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