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STOCKHOLDERS' EQUITY (Details) - USD ($)
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Jul. 31, 2021
Class of Stock [Line Items]          
Dividends outstanding $ 22,790,000 $ 22,883,000      
Stock repurchase program, authorized amount         $ 500,000,000
Stock repurchase program, remaining authorized repurchase amount $ 405,524,000        
Treasury stock acquired, average cost per share (in dollars per share) $ 161.90 $ 103.68 $ 85.74    
Class A          
Class of Stock [Line Items]          
Shares issued of common stock (in shares) 53,822,189 52,348,511      
Number of common shares outstanding (in shares) 53,822,189 52,348,511      
Stock repurchased and retired during period, shares (in shares) 322,344,000 240,666 677,287    
Stock repurchased and retired during period, value $ 52,189,000 $ 24,952,000 $ 58,073,000    
Class B          
Class of Stock [Line Items]          
Shares issued of common stock (in shares) 16,021,106 16,746,676      
Number of common shares outstanding (in shares) 16,021,106 16,746,676      
Stock repurchased and retired during period, shares (in shares) 676,572,000 772,794,000 507,511,000    
Stock repurchased and retired during period, value $ 102,343,000 $ 70,713,000 $ 42,283,000    
Director | Class A          
Class of Stock [Line Items]          
Shares issued to non-employee directors (in shares) 5,248 6,609      
Investor | Class A          
Class of Stock [Line Items]          
Shares issued of common stock (in shares) 53,753,606 52,283,576      
Common stock | Class A          
Class of Stock [Line Items]          
Shares issued to non-employee directors (in shares) 5,248 6,609 6,739    
Shares converted from Class B to Class A (in shares) 1,699,118 1,942,078      
Number of common shares outstanding (in shares) 53,822,189 52,348,511 50,638,924 49,853,564  
Common stock | Class B          
Class of Stock [Line Items]          
Number of common shares outstanding (in shares) 16,021,106 16,746,676 18,048,345 17,649,555  
Director | Class A          
Class of Stock [Line Items]          
Shares issued of common stock (in shares) 68,583 64,935