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Derivative Instruments and Activities (Tables)
 12 Months Ended
Apr. 30, 2022
Derivative Instruments and Activities [Abstract]  
Summary of Interest Rate Swaps Designated as Cash Flow Hedges
The following table summarizes our interest rate swaps designated as cash flow hedges:

      
Notional Amount
           
       
As of April 30,
          
Hedged Item
Date entered into
Nature of Swap
  
2022
    
2021
    
Fixed Interest Rate
  
Variable Interest Rate
Amended and Restated RCA
April 7, 2022
Pay fixed/receive variable
  
$
100
    
$
—
      
2.646
%
1-month LIBOR reset every month for a 2-year period ending April 15, 2024
Amended and Restated RCA
April 12, 2021
Pay fixed/receive variable
    
100
      
100
      
0.500
%
1-month LIBOR reset every month for a 3-year period ending April 15, 2024
Amended and Restated RCA
February 26, 2020
Pay fixed/receive variable
    
100
      
100
      
1.150
%
1-month LIBOR reset every month for a 3-year period ending March 15, 2023
Amended and Restated RCA
August 7, 2019
Pay fixed/receive variable
    
100
      
100
      
1.400
%
1-month LIBOR reset every month for a 3-year period ending August 15, 2022
Amended and Restated RCA
June 24, 2019
Pay fixed/receive variable
    
100
      
100
      
1.650
%
1-month LIBOR reset every month for a 3-year period ending July 15, 2022
         
$
500
    
$
400