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EARNINGS PER SHARE AND STOCKHOLDERS' EQUITY (Narrative) (Details) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 31, 2021 | Jan. 31, 2020 | Jan. 31, 2021 | Jan. 31, 2020
Earnings Per Share [Abstract] |  |  |  |
Antidilutive securities excluded from computation of earnings per share, amount (in shares) | 5,400 | 3,700 | 5,400 | 3,700
Basic weighted average common shares (in shares) | 183,438 | 194,077 | 188,548 | 198,064
Nonvested units granted (in shares) |  |  | 2,500 |
Stock-based compensation | $ 5,800 | $ 6,600 | $ 20,700 | $ 22,700
Unrecognized compensation costs, nonvested shares and units | 40,900 |  | 40,900 |
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount | $ 800 |  | $ 800 |

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