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EARNINGS PER SHARE (Details) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 31, 2018 USD ($) $ / shares shares | Jan. 31, 2017 USD ($) $ / shares shares | Jan. 31, 2018 USD ($) $ / shares shares | Jan. 31, 2017 USD ($) $ / shares shares
Earnings Per Share [Abstract] |  |  |  |
Ratio of units exchanged for shares |  |  | 1 |
NUMERATOR |  |  |  |
Income (loss) from continuing operations – controlling interests | $ 5,115 | $ 1,051 | $ (9,215) | $ (26,487)
Income from discontinued operations – controlling interests | 130,990 | 22,059 | 146,877 | 39,554
Net income attributable to controlling interests | 136,105 | 23,110 | 137,662 | 13,067
Dividends to preferred shareholders | (1,766) | (2,503) | (6,864) | (8,260)
Redemption of preferred shares | (8) | (1,435) | (3,657) | (1,435)
NET INCOME AVAILABLE TO COMMON SHAREHOLDERS | 134,331 | 19,172 | 127,141 | 3,372
Noncontrolling interests – Operating Partnership | 16,236 | 2,525 | 15,365 | 403
Numerator for diluted earnings per share | $ 150,567 | $ 21,697 | $ 142,506 | $ 3,775
DENOMINATOR |  |  |  |
Denominator for basic earnings per share weighted average shares (in shares) | shares | 119,741 | 121,255 | 120,102 | 121,175
Effect of redeemable operating partnership units (in shares) | shares | 14,434 | 16,120 | 14,768 | 16,229
Denominator for diluted earnings per share (in shares) | shares | 134,175 | 137,375 | 134,870 | 137,404
Earnings (loss) per common share from continuing operations – basic and diluted (in dollars per share) | $ / shares | $ 0.03 | $ (0.03) | $ (0.16) | $ (0.30)
Earnings per common share from discontinued operations – basic and diluted (in dollars per share) | $ / shares | 1.09 | 0.19 | 1.22 | 0.33
NET EARNINGS PER COMMON SHARE – BASIC & DILUTED (in dollars per share) | $ / shares | $ 1.12 | $ 0.16 | $ 1.06 | $ 0.03

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