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COMMITMENTS AND CONTINGENCIES (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2022
USD ($)
loan
Sep. 30, 2021
USD ($)
loan
Jun. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jun. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Guarantor Obligations [Line Items]                
Provision for (recovery of) credit losses $ 7,454,000 $ (21,310,000) $ 34,693,000 $ (109,033,000)        
Allowance for credit losses 146,195,000 104,871,000 146,195,000 104,871,000 $ 141,970,000 $ 94,507,000 $ 132,418,000 $ 228,804,000
Unfunded Lending Commitment                
Guarantor Obligations [Line Items]                
Provision for (recovery of) credit losses 700,000 $ (400,000) 600,000 $ (500,000)        
Allowance for credit losses $ 12,200,000   12,200,000     $ 7,400,000    
Secondary Market Loan Sales                
Guarantor Obligations [Line Items]                
Provision for (recovery of) credit losses     $ 0          
Number of loans repurchased | loan     2 0        
Loans repurchase amount     $ 800,000