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Consolidated Statements Of Shareholders' Equity (USD $) In Thousands | Common Stock [Member] | Retained Earnings [Member] | Total
--- | --- | --- | ---
Balance at Apr. 30, 2010 | $ 64,439 | $ 759,880 | $ 824,319
Net earnings |  | 94,623 | 94,623
Dividends declared |  | (20,467) | (20,467)
Repurchase of common stock | (66,890) | (434,136) | (501,026)
Proceeds from exercise of stock options | 3,733 |  | 3,733
Tax benefits related to nonqualified stock options | 648 |  | 648
Stock based compensation | 2,066 |  | 2,066
Balance at Apr. 30, 2011 | 3,996 | 399,900 | 403,896
Net earnings |  | 116,791 | 116,791
Dividends declared |  | (22,849) | (22,849)
Proceeds from exercise of stock options | 3,249 |  | 3,249
Tax benefits related to nonqualified stock options | 1,162 |  | 1,162
Stock based compensation | 3,792 |  | 3,792
Balance at Apr. 30, 2012 | 12,199 | 493,842 | 506,041
Net earnings |  | 110,625 | 110,625
Dividends declared |  | (25,291) | (25,291)
Proceeds from exercise of stock options | 4,721 |  | 4,721
Tax benefits related to nonqualified stock options | 1,929 |  | 1,929
Stock based compensation | 4,270 |  | 4,270
Balance at Apr. 30, 2013 | $ 23,119 | $ 579,176 | $ 602,295

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