XML 37 R27.htm IDEA: XBRL DOCUMENT v3.5.0.2
Organization and Summary of Significant Accounting Policies - Additional Information (Detail)
 3 Months Ended 6 Months Ended 12 Months Ended
Oct. 31, 2016
USD ($)
Country
Office
Oct. 31, 2015
USD ($)
Oct. 31, 2016
USD ($)
Country
Office
Oct. 31, 2015
USD ($)
Apr. 30, 2016
USD ($)
Jul. 31, 2016
USD ($)
Organization And Summary Of Significant Accounting Policies [Line Items]            
Number of offices | Office 128   128      
Number of countries in which entity operates | Country 52   52      
Investments in affiliated companies maximum 50.00%   50.00%      
Deferred revenue $ 88,400,000   $ 88,400,000   $ 95,900,000  
Impairment of goodwill     0   0  
Impairment of intangible assets     0   $ 0  
Performance related bonus expenses $ 52,700,000 $ 44,600,000 $ 95,100,000 $ 86,400,000    
Accounting Standards Update 2015-03 | Restatement Adjustment            
Organization And Summary Of Significant Accounting Policies [Line Items]            
Unamortized debt issuance costs           $ 4,200,000
Unamortized debt issuance costs, current           900,000
Unamortized debt issuance costs, non-current           $ 3,300,000
Minimum            
Organization And Summary Of Significant Accounting Policies [Line Items]            
Intangible assets estimated useful lives     1 year      
Maximum            
Organization And Summary Of Significant Accounting Policies [Line Items]            
Intangible assets estimated useful lives     24 years