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Stock and Stock-Based Incentive Plans Stock and Stock-Based Incentive Plans (Composition of Share-Based Compensation Expense - By Grant Type) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Nov. 30, 2021 | Nov. 30, 2020 | Nov. 30, 2021 | Nov. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense, before income taxes | $ 36,784 | $ 11,677 | $ 110,921 | $ 75,632
Stock options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense, before income taxes | 7,846 | 6,630 | 27,375 | 25,237
Cash-settled restricted stock units (RSUs) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense, before income taxes | 23,836 | 1,210 | 62,398 | 33,784
Stock-settled market stock units (MSUs) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense, before income taxes | 3,171 | 3,161 | 11,260 | 12,516
Stock-settled performance stock units (PSUs) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense, before income taxes | 964 | 112 | 5,334 | 378
Restricted Stock [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense, before income taxes | 365 | 39 | 670 | 106
Stock-settled deferred stock units (DSUs) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense, before income taxes | 0 | 0 | 1,925 | 1,925
Employee stock purchase plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense, before income taxes | 602 | 525 | 1,959 | 1,686
Other share-based incentives |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense, before income taxes | $ 1,931 | $ 676 | $ 9,888 | $ 4,095

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