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Loans Portfolio - Schedule of Interests in Loans Receivable Held For Investment (Details) (Parenthetical)
Sep. 30, 2021
Dec. 31, 2020
Held-to-maturity Securities | London Interbank Offered Rate (LIBOR)    
Financing Receivable Recorded Investment Past Due [Line Items]    
One month LIBOR 0.08% 0.14%