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STOCKHOLDERS' EQUITY (Details)
 3 Months Ended
Jun. 30, 2022
USD ($)
$ / shares
shares
Jun. 30, 2021
USD ($)
$ / shares
shares
Mar. 31, 2022
shares
Jul. 31, 2021
USD ($)
Mar. 31, 2021
shares
Aug. 18, 2015
Class of Stock [Line Items]            
Conversion ratio of common stock           1
Dividends outstanding | $ $ 8,766,000 $ 5,103,000        
Authorized amount to be repurchased | $       $ 500,000,000    
Weighted average price per share (in dollars per share) | $ / shares $ 85,340 $ 76,740        
Class A Common Stock            
Class of Stock [Line Items]            
Shares issued of common stock (in shares) 49,649,765   49,853,564      
Number of common shares outstanding (in shares) 49,649,765   49,853,564      
Outstanding common stock repurchased and retired (in shares) 477,030,000 879,138,000        
Shares repurchased and retired, value | $ $ 40,710,000 $ 67,467,000        
Class A Common Stock | Common stock            
Class of Stock [Line Items]            
Shares issued to non-employee directors (in shares) 6,739,000 6,512,000        
Conversion of Class B to Class A shares (in shares) 39,833,000 718,453,000        
Number of common shares outstanding (in shares) 49,649,765,000 51,091,269,000 49,853,564,000   51,245,442,000  
Class B Common Stock            
Class of Stock [Line Items]            
Shares issued of common stock (in shares) 19,136,952   17,649,555      
Number of common shares outstanding (in shares) 19,136,952   17,649,555      
Outstanding common stock repurchased and retired (in shares) 496,731,000 454,912,000        
Shares repurchased and retired, value | $ $ 42,121,000 $ 33,700,000        
Class B Common Stock | Common stock            
Class of Stock [Line Items]            
Number of common shares outstanding (in shares) 19,136,952,000 17,745,973,000 17,649,555,000   16,951,696,000  
Investor | Class A Common Stock            
Class of Stock [Line Items]            
Shares issued of common stock (in shares) 49,591,439,000 51,037,243,000        
Director | Class A Common Stock            
Class of Stock [Line Items]            
Shares issued to non-employee directors (in shares) 6,739,000 6,512,000        
HL Holders | Class B Common Stock            
Class of Stock [Line Items]            
Number of common shares outstanding (in shares) 19,136,952,000 17,745,973,000        
Director | Class A Common Stock            
Class of Stock [Line Items]            
Shares issued of common stock (in shares) 58,326,000 54,026,000