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INCOME TAXES - Effective Income Tax Rate Reconciliation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Effective Income Tax Rate Reconciliation, Amount      
Federal income tax provision computed at statutory rate $ 111,580 $ 82,013 $ 68,040
State and local taxes, net of federal tax effect 21,297 20,027 16,609
Tax impact from foreign operations 12,535 7,922 (5,040)
Nondeductible expenses 14,313 9,133 9,396
Stock compensation (20,387) (7,468) (8,044)
Uncertain tax positions, true-up items, and other (7,714) (1,389) (11,184)
Total $ 131,624 $ 110,238 $ 69,777
Effective Income Tax Rate Reconciliation, Percent      
Federal income tax provision computed at statutory rate 21.00% 21.00% 21.00%
State and local taxes, net of federal tax effect 4.00% 5.10% 5.10%
Tax impact from foreign operations 2.40% 2.00% (1.50%)
Nondeductible expenses 2.70% 2.40% 2.90%
Stock compensation (3.80%) (1.90%) (2.50%)
Uncertain tax positions, true-up items, and other (1.50%) (0.40%) (3.50%)
Total 24.80% 28.20% 21.50%