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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Interest Receivable (Details)
$ in Thousands
Dec. 31, 2020
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Interest Receivable $ 37,682
Held-to-maturity Securities [Member]  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Interest Receivable 300
Available-for-sale Securities [Member]  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Interest Receivable $ 12,900