Annual report [Section 13 and 15(d), not S-K Item 405]

SECURITIES REPURCHASE AGREEMENT OBLIGATIONS - Narrative (Details)

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SECURITIES REPURCHASE AGREEMENT OBLIGATIONS - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Securities Sold under Agreements to Repurchase [Abstract]    
Fair value of collateral pledged under repurchase agreements $ 1,023,223 $ 1,436,271
Interest payable accrued on securities purchased under reverse repurchase agreements $ 3,453 $ 4,798
Repurchase agreement counterparty, weighted average maturity of agreements 6 days 10 days