Quarterly report pursuant to Section 13 or 15(d)

CASH AND CASH EQUIVALENTS - Schedule of cash and cash equivalents (Details)

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CASH AND CASH EQUIVALENTS - Schedule of cash and cash equivalents (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2021
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents $ 905,685 $ 626,363 $ 678,717
Securities purchased under reverse repurchase agreements      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents 319,799 278,685  
Current accounts in clearing organizations      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents 209,233 78,177  
Current accounts with commercial banks      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents 101,547 68,933  
Petty cash in bank vault and on hand      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents 74,685 37,148  
Current account with National Bank (Kazakhstan)      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents 64,416 42,517  
Current account with National Settlement Depository (Russia)      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents 52,953 35,860  
Current accounts with brokers      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents 31,110 65,085  
Accounts with stock exchanges      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents 25,827 11,791  
Current account with Central Bank (Russia)      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents 16,923 3,654  
Cash in transit      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents 9,151 4,177  
Current account with Central Depository (Kazakhstan)      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents $ 41 $ 336