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INVESTMENT SECURITIES - Schedule of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Securities Held to Maturity (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Mar. 31, 2025
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost $ 184,064 $ 195,301
Gross Unrealized Gains 722 644
Gross Unrealized (Losses) (144) (321)
Fair Value 184,642 195,624
Corporate debt securities    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 160,466 177,687
Gross Unrealized Gains 578 627
Gross Unrealized (Losses) (63) (164)
Fair Value 160,981 178,150
U.S. treasury securities    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 23,220 17,044
Gross Unrealized Gains 144 17
Gross Unrealized (Losses) (81) (157)
Fair Value 23,283 16,904
Common stock    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 24 21
Gross Unrealized Gains 0 0
Gross Unrealized (Losses) 0 0
Fair Value 24 21
Certificates of deposit    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 354 549
Gross Unrealized Gains 0 0
Gross Unrealized (Losses) 0 0
Fair Value $ 354 $ 549