XML 37 R27.htm IDEA: XBRL DOCUMENT v3.5.0.2
Organization and Summary of Significant Accounting Policies - Additional Information (Detail)
 3 Months Ended 12 Months Ended
Jul. 31, 2016
USD ($)
Country
Office
Jul. 31, 2015
USD ($)
Apr. 30, 2016
USD ($)
Organization And Summary Of Significant Accounting Policies [Line Items]      
Number of offices | Office 128    
Number of countries in which entity operates | Country 52    
Investments in affiliated companies maximum 50.00%    
Deferred revenue $ 88,900,000   $ 95,900,000
Impairment of goodwill 0   0
Impairment of intangible assets 0   $ 0
Performance related bonus expenses 42,400,000 $ 41,800,000  
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