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Consolidated Statement of Comprehensive Income (Unaudited) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jan. 31, 2018
Jan. 31, 2017
Jan. 31, 2018
Jan. 31, 2017
Statement of Comprehensive Income [Abstract]        
Net income (Loss), Including Portion Attributable to Noncontrolling Interest $ 103,301 $ 66,066 $ 180,861 $ 233,346
Other comprehensive income:        
Foreign currency translation adjustments 23,243 8,420 21,763 (10,355)
Comprehensive income, net of tax:        
Comprehensive income 126,544 74,486 202,624 222,991
Comprehensive income attributable to noncontrolling interest 45 0 90 0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent $ 126,499 $ 74,486 $ 202,534 $ 222,991