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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Risk free rate | 0.30% |
Number of shares repurchased (in shares) | 0 | 0
Tranche One |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share price (in dollars per share) | $ 25.78 |
Tranche Two |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share price (in dollars per share) | 33.32 |
Tranche Three |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share price (in dollars per share) | $ 34.48 |
Employee Stock |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Total intrinsic value of options exercised | $ 9.1 | $ 0.1
Unrecognized compensation cost | $ 0.3 |
Weighted average period of recognition for unrecognized compensation expense | 10 months 24 days |
Performance Shares |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Unrecognized compensation cost | $ 32.3 |
Change in number of shares earned | 2.00% |
Maximum percentage of awards to be earned | 200.00% |
Number of shares earned (in shares) | 0 |
Performance Shares | Minimum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Vesting performance period percentage | 0.00% |
Total shareholder return performance, lowest percentage to still earn awards | (30.00%) |
Performance Shares | Maximum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Vesting performance period percentage | 200.00% |
Performance Shares | Tranche One | Minimum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Vesting performance period percentage | 90.00% |
Performance Shares | Tranche One | Maximum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Vesting performance period percentage | 110.00% |
Stock Exchange Program |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Unrecognized compensation cost | $ 8.8 |
Volatility factors | 58.70% |
Employee Stock Purchase Plan | Employee Stock |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Unrecognized compensation cost | $ 0.6 |
Weighted average period of recognition for unrecognized compensation expense | 1 month 6 days |
Number of shares reserved for future issuance (in shares) | 2,865,669 |

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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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