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

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Net number of non-option equity instruments granted to participants.

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