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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, 200883,274,995   
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Net income  141,103141,103
Currency translation adjustment (27,915) (27,915)
Comprehensive income   113,188
Exercise of stock options, net of repurchased shares1,842 (8,492)(6,650)
Exercise of stock options, net of repurchased shares (in shares)580,985   
Employee share-based compensation and related tax benefit13,983  13,983
Shares issued for Employee Stock Purchase Plan1,942  1,942
Shares issued for Employee Stock Purchase Plan (in shares)82,834   
Balances at Jul. 31, 2009334,440(27,082)614,101921,459
Balances (in shares) at Jul. 31, 200983,938,814   
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Net income  151,627151,627
Currency translation adjustment (5,659) (5,659)
Comprehensive income   145,968
Exercise of stock options, net of repurchased shares5,351 (7,315)(1,964)
Exercise of stock options, net of repurchased shares (in shares)477,465   
Employee share-based compensation and related tax benefit24,184  24,184
Shares issued for Employee Stock Purchase Plan2,044  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, 2010365,507(32,741)754,4681,087,234
Balances (in shares) at Jul. 31, 201084,363,063  84,363,063
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Net income  166,375166,375
Currency translation adjustment 9,516 9,516
Comprehensive income   175,891
Exercise of stock options, net of repurchased shares6,486 (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 benefit22,645  22,645
Shares issued for Employee Stock Purchase Plan1,957  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, 201166,005,517  66,005,517