CASH AND CASH EQUIVALENTS - Schedule of cash and cash equivalents (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Mar. 31, 2026	Jun. 30, 2025
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 1,351,050	$ 966,115	$ 567,907
Allowance for Cash and cash equivalents	(1,025)	(734)
Short term deposits in commercial banks
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	271,416	292,879
Short term deposits in National Bank (Kazakhstan)
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	344,493	328,242
Securities purchased under reverse repurchase agreements
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	58,782	207,893
Petty cash in bank vault and on hand
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	80,052	97,595
Short term deposits in stock exchanges
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	6,980	3,686
Short term deposits in National Bank (Tajikistan)
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	2,684	1,136
Short term deposits on brokerage accounts
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	317,750	5,621
Cash in transit
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	15,586	18,710
Overnight deposits
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	252,881	6,972
Short term deposits in the Central Depository (Kazakhstan)
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	1,238	3,904
Other short term deposits and accounts
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 213	$ 211