Quarterly report [Sections 13 or 15(d)]

INVESTMENT SECURITIES - Schedule of amortized cost, unrealized gains and losses accumulated in other comprehensive income, and fair value of available-for-sale securities (Details)

v3.25.2
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
Jun. 30, 2025
Mar. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Assets measured at amortized cost $ 496,949 $ 477,156
Accumulated impairment loss (360) (406)
Unrealized loss/(gain) accumulated in other comprehensive income/(loss) including foreign currency translation adjustments, net (4,451) (3,163)
Assets measured at fair value 492,138 473,587
Non-US sovereign debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Assets measured at amortized cost 236,209 211,628
Accumulated impairment loss (360) (378)
Unrealized loss/(gain) accumulated in other comprehensive income/(loss) including foreign currency translation adjustments, net (5,277) (3,019)
Assets measured at fair value 230,572 208,231
Corporate debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Assets measured at amortized cost 238,735 243,660
Accumulated impairment loss 0 (28)
Unrealized loss/(gain) accumulated in other comprehensive income/(loss) including foreign currency translation adjustments, net 985 98
Assets measured at fair value 239,720 243,730
U.S. sovereign debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Assets measured at amortized cost 22,005 21,868
Accumulated impairment loss 0 0
Unrealized loss/(gain) accumulated in other comprehensive income/(loss) including foreign currency translation adjustments, net (159) (242)
Assets measured at fair value $ 21,846 $ 21,626