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
Dec. 31, 2021
Mar. 31, 2021
Dec. 31, 2020
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents $ 146,358 $ 168,017 $ 155,376
Securities purchased under reverse repurchase agreements      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents 13,826 11,917  
Current accounts with brokers      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents 27,582 37,324  
Current account with National Bank (Kazakhstan)      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents 55,816 36,726  
Current accounts with commercial banks      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents 39,076 61,203  
Petty cash in bank vault and on hand      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents 7,051 14,916  
Accounts with stock exchanges      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents 2,254 5,873  
Current account with Central Depository (Kazakhstan)      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents $ 753 $ 58