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v3.25.3

INVESTMENT SECURITIES - Schedule of amortized cost, unrealized gains and losses accumulated in other comprehensive income, and fair value of available-for-sale securities (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Mar. 31, 2025
--- | --- | ---
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Assets measured at amortized cost | $ 446,079 | $ 477,156
Accumulated impairment loss | (388) | (406)
Unrealized gain/(loss) accumulated in other comprehensive income/(loss) including foreign currency translation adjustments, net | (5,890) | (3,163)
Assets measured at fair value | 439,801 | 473,587
Corporate debt |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Assets measured at amortized cost | 198,580 | 243,660
Accumulated impairment loss | 0 | (28)
Unrealized gain/(loss) accumulated in other comprehensive income/(loss) including foreign currency translation adjustments, net | (904) | 98
Assets measured at fair value | 197,676 | 243,730
Non-US sovereign debt |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Assets measured at amortized cost | 225,572 | 211,628
Accumulated impairment loss | (388) | (378)
Unrealized gain/(loss) accumulated in other comprehensive income/(loss) including foreign currency translation adjustments, net | (4,970) | (3,019)
Assets measured at fair value | 220,214 | 208,231
U.S. sovereign debt |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Assets measured at amortized cost | 21,927 | 21,868
Accumulated impairment loss | 0 | 0
Unrealized gain/(loss) accumulated in other comprehensive income/(loss) including foreign currency translation adjustments, net | (16) | (242)
Assets measured at fair value | $ 21,911 | $ 21,626

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