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Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands | Total | Common Stock | Retained Earnings
--- | --- | --- | ---
Beginning Balance (shares) at Apr. 30, 2016 |  | 39,055,570 |
Beginning Balance at Apr. 30, 2016 | $ 1,083,463 | $ 72,868 | $ 1,010,595
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Net income | 177,485 |  | 177,485
Dividends declared | (37,534) |  | (37,534)
Exercise of stock options (shares) |  | 69,150 |
Exercise of stock options | 2,357 | $ 2,357 |
Issuance of common stock (shares) |  | 28,138 |
Issuance of common stock | 3,526 | $ 3,526 |
Repurchase of common stock (shares) |  | (443,800) |
Repurchase of common stock | (49,374) | $ (49,374) |
Stock-based compensation (shares) |  | 56,763 |
Stock-based compensation | 10,697 | $ 10,697 |
Ending Balance (shares) at Apr. 30, 2017 |  | 38,765,821 |
Ending Balance at Apr. 30, 2017 | 1,190,620 | $ 40,074 | 1,150,546
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Net income | 317,903 |  | 317,903
Dividends declared | (39,060) |  | (39,060)
Exercise of stock options (shares) |  | 40,377 |
Exercise of stock options | 1,377 | $ 1,377 |
Repurchase of common stock (shares) |  | (1,997,800) |
Repurchase of common stock | (215,434) | $ (57,186) | (158,248)
Stock-based compensation (shares) |  | 65,924 |
Stock-based compensation | $ 15,735 | $ 15,735 |
Ending Balance (shares) at Apr. 30, 2018 | 36,874,322 | 36,874,322 |
Ending Balance at Apr. 30, 2018 | $ 1,271,141 | $ 0 | 1,271,141
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Net income | 203,886 |  |
Dividends declared | (42,471) |  | (42,471)
Exercise of stock options (shares) |  | 71,546 |
Exercise of stock options | 2,290 | $ 2,290 |
Repurchase of common stock (shares) |  | (352,592) |
Repurchase of common stock | (35,247) |  | (35,247)
Stock-based compensation (shares) |  | 71,245 |
Stock-based compensation | $ 13,310 | $ 13,310 |
Ending Balance (shares) at Apr. 30, 2019 | 36,664,521 | 36,664,521 |
Ending Balance at Apr. 30, 2019 | $ 1,408,769 | $ 15,600 | $ 1,393,169

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