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STOCKHOLDERS' EQUITY (Details)
 3 Months Ended
Jun. 30, 2024
USD ($)
class_of_stock
vote
shares
Jun. 30, 2023
USD ($)
shares
Mar. 31, 2024
shares
Mar. 31, 2023
shares
Apr. 30, 2022
USD ($)
Class of Stock [Line Items]          
Number of classes of common stock | class_of_stock 2        
Conversion ratio of common stock 1        
Dividends outstanding | $ $ 15,840,000 $ 14,673,000      
Authorized amount to be repurchased | $         $ 500,000,000
Stock repurchase program, remaining authorized repurchase amount | $ $ 457,700,000        
Class A Common Stock          
Class of Stock [Line Items]          
Common stock voting rights, number of votes | vote 1        
Shares issued of common stock (in shares) 53,053,499   52,348,511    
Number of common shares outstanding (in shares) 53,053,499   52,348,511    
Class A Common Stock | Common stock          
Class of Stock [Line Items]          
Shares issued to non-employee directors (in shares) 5,248        
Conversion of Class B to Class A shares (in shares) 608,084 651,068      
Number of common shares outstanding (in shares) 53,053,499 51,296,601 52,348,511 50,638,924  
Class B Common Stock          
Class of Stock [Line Items]          
Common stock voting rights, number of votes | vote 10        
Shares issued of common stock (in shares) 16,456,793   16,746,676    
Number of common shares outstanding (in shares) 16,456,793   16,746,676    
Outstanding common stock repurchased and retired (in shares) 672,581,000 507,511,000      
Shares repurchased and retired, value | $ $ 100,993,000 $ 69,766,000      
Class B Common Stock | Common stock          
Class of Stock [Line Items]          
Number of common shares outstanding (in shares) 16,456,793 18,035,565 16,746,676 18,048,345  
Investor | Class A Common Stock          
Class of Stock [Line Items]          
Shares issued of common stock (in shares) 52,983,316,000 51,231,666,000      
HL Holders | Class B Common Stock          
Class of Stock [Line Items]          
Number of common shares outstanding (in shares) 16,456,793,000 18,035,565,000      
Director | Class A Common Stock          
Class of Stock [Line Items]          
Shares issued to non-employee directors (in shares) 5,248 6,609      
Shares issued of common stock (in shares) 70,183,000 64,935,000