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Stock-Based Compensation (Tables) | 9 Months Ended
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Dec. 31, 2024
Stock-Based Compensation |
Fair Value of Stock-Based Compensation Awards | The weighted-average fair value of stock-based compensation awards granted during the nine months ended December 31, 2024 and 2023 were as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Nine months ended December 31,
​ | ​ | 2024 | ​ | 2023
​ | ​ | ​ | ​ | Fair Value | ​ | ​ | ​ | Fair Value
​ | ​ | Shares |  | Per Award |  | Shares |  | Per Award
Performance stock awards |  | 0.1 | ​ | $ | 103.98 |  | 0.3 | ​ | $ | 27.52
Restricted stock awards |  | 0.1 | ​ | $ | 110.99 |  | 0.2 | ​ | $ | 37.59
Unrecognized Compensation Expense Related to Non-Vested Stock-Based Compensation Awards | As of December 31, 2024, unrecognized compensation expense related to non-vested stock-based compensation awards, which will be recognized as expense over the remaining service periods, was as follows: ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrecognized | ​ | Weighted-Average
​ | ​ | Compensation | ​ | Remaining Service
​ |  | Expense |  | Period in Years
Performance stock awards | ​ | $ | 26.6 |  | 2.0
Restricted stock awards | ​ |  | 7.8 |  | 1.7
Stock options | ​ |  | 0.3 |  | 0.5
Total | ​ | $ | 34.7 |  | 1.9

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- Definition Tabular disclosure of cost not yet recognized and weighted-average period over which cost is expected to be recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (i) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the weighted-average grant-date fair value of equity options or other equity instruments granted during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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