Annual report pursuant to Section 13 and 15(d)

Organization and Summary of Significant Accounting Policies - Additional Information (Detail)

v3.22.2
Organization and Summary of Significant Accounting Policies - Additional Information (Detail)
 12 Months Ended
Apr. 30, 2022
USD ($)
Segment
Apr. 30, 2021
USD ($)
Apr. 30, 2020
USD ($)
Facility
Organization And Summary Of Significant Accounting Policies [Line Items]      
Number of business segments | Segment 7    
Number of line of business | Segment 4    
Credit loss for available for sales debt securities $ 0 $ 0 $ 0
Business acquisitions adjustment, increase in goodwill   2,643,000  
Impairment of right of use assets 7,392,000   2,282,000
Impairment of fixed assets 1,915,000   372,000
Impairment of long-lived assets   0  
Impairment of goodwill 0    
Impairment of intangible assets 0 0 0
Performance-related bonus expenses $ 447,600,000 287,300,000 197,100,000
Percentage that Actuarial gain or loss must exceed the greater of PBO or Market Value Plan Assets 10.00%    
Cash surrender value of company owned life insurance policies, net of loans $ 183,308,000 161,295,000  
ASU 2021-01      
Organization And Summary Of Significant Accounting Policies [Line Items]      
Change in accounting principle, accounting standards update, adopted true    
Change in accounting principle, accounting standards update, adoption date May 01, 2021    
Change in accounting principle, accounting standards update, immaterial effect true    
General and Administrative Expenses      
Organization And Summary Of Significant Accounting Policies [Line Items]      
Foreign currency gains (losses) $ (1,200,000) (2,700,000) $ (4,100,000)
CSV of COLI Contracts      
Organization And Summary Of Significant Accounting Policies [Line Items]      
Cash surrender value of company owned life insurance policies, net of loans $ 183,300,000 161,300,000  
Executive Capital Accumulation Plan      
Organization And Summary Of Significant Accounting Policies [Line Items]      
Deferred compensation arrangement vesting period 5 years    
Minimum      
Organization And Summary Of Significant Accounting Policies [Line Items]      
Intangible assets estimated useful lives 1 year    
Amortization of long-term retention awards 4 years    
Maximum      
Organization And Summary Of Significant Accounting Policies [Line Items]      
Intangible assets estimated useful lives 24 years    
Amortization of long-term retention awards 5 years    
Software and Software Development Costs | Minimum      
Organization And Summary Of Significant Accounting Policies [Line Items]      
Property and equipment estimated useful life 3 years    
Software and Software Development Costs | Maximum      
Organization And Summary Of Significant Accounting Policies [Line Items]      
Property and equipment estimated useful life 10 years    
Other Capitalized Property Plant and Equipment | Minimum      
Organization And Summary Of Significant Accounting Policies [Line Items]      
Property and equipment estimated useful life 3 years    
Other Capitalized Property Plant and Equipment | Maximum      
Organization And Summary Of Significant Accounting Policies [Line Items]      
Property and equipment estimated useful life 10 years    
Leasehold Improvements and Furniture and Fixtures      
Organization And Summary Of Significant Accounting Policies [Line Items]      
Impairment of fixed assets $ 1,900,000    
Acquired Companies      
Organization And Summary Of Significant Accounting Policies [Line Items]      
Business acquisitions adjustment, increase in goodwill   $ 2,600,000  
Number of office leases closed | Facility     16
Impairment of right of use assets     $ 2,300,000
Acquired Companies | Digital      
Organization And Summary Of Significant Accounting Policies [Line Items]      
Impairment of right of use assets     2,300,000
Acquired Companies | Leasehold Improvements and Furniture and Fixtures | Digital      
Organization And Summary Of Significant Accounting Policies [Line Items]      
Impairment of fixed assets     $ 400,000
Mexican Subsidiary      
Organization And Summary Of Significant Accounting Policies [Line Items]      
Percentage of Noncontrolling interest in subsidiary 51.00%