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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Mar. 31, 2025
Sep. 30, 2024
Mar. 31, 2024
Accounting Policies [Abstract]        
Cash and cash equivalents $ 923,576 $ 971,007    
Restricted cash 4,822 4,572    
Total cash, cash equivalents, and restricted cash $ 928,398 $ 975,579 $ 692,862 $ 721,854