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Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data | Total | Treasury Stock | Common Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss)
--- | --- | --- | --- | --- | --- | ---
Beginning Balance at Jul. 31, 2011 |  | $ (189,104) | $ 6,170 | $ 190,127 | $ 829,148 | $ (67)
Beginning Balance (in shares) at Jul. 31, 2011 |  | 5,857,339 | 61,697,349 |  |  |
Net income | 121,739 |  |  |  | 121,739 |
Shares purchased (in shares) |  | 3,000,000 |  |  |  |
Shares purchased |  | (77,000) |  |  |  |
Stock option and restricted stock activity (in shares) |  |  | 80,500 |  |  |
Stock option and restricted stock activity |  |  | 8 | 1,433 |  |
Cash dividends - $.60 in 2012, $0.72 in 2013, $0.92 in 2014 per common share |  |  |  |  | (32,322) |
Unrealized appreciation on investments, net of tax | 7 |  |  |  |  | 7
Stock compensation expense |  |  |  | 688 |  |
Ending Balance at Jul. 31, 2012 |  | (266,104) | 6,178 | 192,248 | 918,565 | (60)
Ending Balance (in shares) at Jul. 31, 2012 |  | 8,857,339 | 61,777,849 |  |  |
Net income | 152,862 |  |  |  | 152,862 |
Stock option and restricted stock activity (in shares) |  | 941 | 203,951 |  |  |
Stock option and restricted stock activity |  | (43) | 21 | 5,783 |  |
Special dividend - $1.50 in 2013, $ 1.00 in 2014 per common share |  |  |  |  | (79,525) |
Cash dividends - $.60 in 2012, $0.72 in 2013, $0.92 in 2014 per common share |  |  |  |  | (38,162) |
Cashless exercises of stock options (in shares) |  |  | 63,464 |  |  |
Cashless exercises of stock options |  |  | 6 | (2,009) |  |
Unrealized appreciation on investments, net of tax | 38 |  |  |  |  | 38
Stock compensation expense |  |  |  | 2,816 |  |
Ending Balance at Jul. 31, 2013 | 892,614 | (266,147) | 6,205 | 198,838 | 953,740 | (22)
Ending Balance (in shares) at Jul. 31, 2013 |  | 8,858,280 | 62,045,264 |  |  |
Net income | 179,002 |  |  |  | 179,002 |
Stock option and restricted stock activity (in shares) |  | 1,831 | 101,313 |  |  |
Stock option and restricted stock activity |  | (101) | 10 | 3,674 |  |
Restricted stock unit activity (in shares) |  | 20,766 | 63,852 |  |  |
Restricted stock unit activity |  | (1,205) | 6 | 758 |  |
Special dividend - $1.50 in 2013, $ 1.00 in 2014 per common share |  |  |  |  | (53,290) |
Cash dividends - $.60 in 2012, $0.72 in 2013, $0.92 in 2014 per common share |  |  |  |  | (49,024) |
Unrealized appreciation on investments, net of tax | 22 |  |  |  |  | 22
Stock compensation expense |  |  |  | 5,231 |  |
Ending Balance at Jul. 31, 2014 | $ 977,697 | $ (267,453) | $ 6,221 | $ 208,501 | $ 1,030,428 |
Ending Balance (in shares) at Jul. 31, 2014 |  | 8,880,877 | 62,210,429 |  |  |

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