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Consolidated Statement of Comprehensive Income (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Oct. 31, 2016
Oct. 31, 2015
Comprehensive income, net of tax:    
Net income $ 167,280 $ 52,610
Other comprehensive income:    
Unrealized gain on interest rate swaps, net (a) [1] 0 440
Reclassification adjustment of interest rate swaps, net (b) [2] 0 (219)
Unrealized gain on available-for-sale securities, net (c) [3] 0 495
Foreign currency translation adjustments (18,775) (6,663)
Total comprehensive income $ 148,505 $ 46,663
[1] Net of tax effect of $(191) for the three months ended October 31, 2015.
[2] Net of tax effect of $122 for the three months ended October 31, 2015.
[3] Net of tax effect of $(279) for the three months ended October 31, 2015.