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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Class A
Class B
Total stockholders' equity
Total stockholders' equity
Cumulative Effect, Period Of Adoption, Adjustment
Common stock
Class A
Common stock
Class B
Additional paid-in capital
Retained earnings
Retained earnings
Cumulative Effect, Period Of Adoption, Adjustment
Accumulated other comprehensive income (loss)
Beginning balance (in shares) at Mar. 31, 2020           46,178,633 19,345,277        
Beginning balance at Mar. 31, 2020       $ 984,382 $ (682) $ 46 $ 19 $ 649,954 $ 377,471 $ (682) $ (43,108)
Increase (Decrease) in Stockholders' Equity                      
Shares issued (in shares)           3,000,000 1,612,091        
Shares issued       223,173   $ 3 $ 2 223,168      
Stock compensation vesting (note 14)       50,152       50,152      
Dividends       (89,464)         (89,464)    
Conversion of Class B to Class A shares (in shares)           3,650,053 (3,650,053)        
Conversion of Class B to Class A shares       0   $ 4 $ (4)        
Shares issued to non-employee directors (note 14) (in shares)           8,751          
Shares issued to non-employee directors (note 14)       333       333      
Other shares repurchased/forfeited (in shares)           (1,591,995) (355,619)        
Other shares repurchased/forfeited       (120,036)   $ (2)   (120,034)      
Net income $ 312,771     312,771         312,771    
Change in unrealized translation       22,932             22,932
Total comprehensive income       335,703         312,771   22,932
Ending balance (in shares) at Mar. 31, 2021           51,245,442 16,951,696        
Ending balance at Mar. 31, 2021       1,383,561   $ 51 $ 17 803,573 600,096   (20,176)
Increase (Decrease) in Stockholders' Equity                      
Shares issued (in shares)             3,107,424        
Shares issued       14,185     $ 3 14,182      
Stock compensation vesting (note 14)       84,320       84,320      
Dividends       (115,624)         (115,624)    
Conversion of Class B to Class A shares (in shares)           1,874,009 (1,874,009)        
Conversion of Class B to Class A shares       0   $ 2 $ (2)        
Shares issued to non-employee directors (note 14) (in shares)           6,512          
Shares issued to non-employee directors (note 14)       477       477      
Other shares repurchased/forfeited (in shares)           (3,272,399) (535,556)        
Other shares repurchased/forfeited       (337,794)   $ (3)   (337,791)      
Net income 438,324     437,751         437,751    
Change in unrealized translation       (23,171)             (23,171)
Total comprehensive income       414,580         437,751   (23,171)
Ending balance (in shares) at Mar. 31, 2022   49,853,564 17,649,555     49,853,564 17,649,555        
Ending balance at Mar. 31, 2022 1,443,705     1,443,705   $ 50 $ 18 564,761 922,223   (43,347)
Increase (Decrease) in Stockholders' Equity                      
Shares issued (in shares)             2,485,582        
Shares issued       16,775     $ 2 16,773      
Stock compensation vesting (note 14)       151,769       151,769      
Dividends       (143,374)         (143,374)    
Conversion of Class B to Class A shares (in shares)           1,455,908 (1,455,908)        
Conversion of Class B to Class A shares       0   $ 1 $ (1)        
Shares issued to non-employee directors (note 14) (in shares)           6,739          
Shares issued to non-employee directors (note 14)       570       570      
Other shares repurchased/forfeited (in shares)           (677,287) (630,884)        
Other shares repurchased/forfeited       (90,904)     $ (1) (90,903)      
Net income 254,223     254,223         254,223    
Change in unrealized translation       (19,467)             (19,467)
Total comprehensive income       234,756         254,223   (19,467)
Ending balance (in shares) at Mar. 31, 2023   50,638,924 18,048,345     50,638,924 18,048,345        
Ending balance at Mar. 31, 2023 $ 1,613,297     $ 1,613,297   $ 51 $ 18 $ 642,970 $ 1,033,072   $ (62,814)