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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY AND COMPREHENSIVE INCOME (USD $) In Thousands, except Share data | Common Stock | Accumulated Other Comprehensive Income (Loss) | Retained Earnings | Total
--- | --- | --- | --- | ---
Balances at Jul. 31, 2008 | $ 316,673 | $ 833 | $ 481,490 | $ 798,996
Balances (in shares) at Jul. 31, 2008 | 83,274,995 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income |  |  | 141,103 | 141,103
Currency translation adjustment |  | (27,915) |  | (27,915)
Comprehensive income |  |  |  | 113,188
Exercise of stock options, net of repurchased shares | 1,842 |  | (8,492) | (6,650)
Exercise of stock options, net of repurchased shares (in shares) | 580,985 |  |  |
Employee share-based compensation and related tax benefit | 13,983 |  |  | 13,983
Shares issued for Employee Stock Purchase Plan | 1,942 |  |  | 1,942
Shares issued for Employee Stock Purchase Plan (in shares) | 82,834 |  |  |
Balances at Jul. 31, 2009 | 334,440 | (27,082) | 614,101 | 921,459
Balances (in shares) at Jul. 31, 2009 | 83,938,814 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income |  |  | 151,627 | 151,627
Currency translation adjustment |  | (5,659) |  | (5,659)
Comprehensive income |  |  |  | 145,968
Exercise of stock options, net of repurchased shares | 5,351 |  | (7,315) | (1,964)
Exercise of stock options, net of repurchased shares (in shares) | 477,465 |  |  |
Employee share-based compensation and related tax benefit | 24,184 |  |  | 24,184
Shares issued for Employee Stock Purchase Plan | 2,044 |  |  | 2,044
Shares issued for Employee Stock Purchase Plan (in shares) | 68,035 |  |  |
Shares repurchased | (512) |  | (3,945) | (4,457)
Shares repurchased, shares | (121,251) |  |  | 121,251
Balances at Jul. 31, 2010 | 365,507 | (32,741) | 754,468 | 1,087,234
Balances (in shares) at Jul. 31, 2010 | 84,363,063 |  |  | 84,363,063
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income |  |  | 166,375 | 166,375
Currency translation adjustment |  | 9,516 |  | 9,516
Comprehensive income |  |  |  | 175,891
Exercise of stock options, net of repurchased shares | 6,486 |  | (3,639) | 2,847
Exercise of stock options, net of repurchased shares (in shares) | 433,263 |  |  | (726,000)
Employee share-based compensation and related tax benefit | 22,645 |  |  | 22,645
Shares issued for Employee Stock Purchase Plan | 1,957 |  |  | 1,957
Shares repurchased | (82,655) |  | (652,747) | (735,402)
Shares repurchased, shares | (18,854,405) |  |  | 6,682,317
Balances at Jul. 31, 2011 | $ 313,940 | $ (23,225) | $ 264,457 | $ 555,172
Balances (in shares) at Jul. 31, 2011 | 66,005,517 |  |  | 66,005,517

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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration