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GUARANTEES (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Guarantor Obligations [Line Items]      
Acquired standby letters of credit and financial guarantees $ 29,400   $ 25,200
Unpaid principal balance of residential subject loans subject to credit recourse 118,700   121,800
Repurchased GNMA 718 $ 980  
Repurchased loans not subject to credit recourse provision 7,800 12,600  
Gain (loss) from early extinguishment of debt 42 0  
Serviced mortgage loans for third parties 5,800,000   5,700,000
Funds advanced to investors under servicing agreements 14,400   12,900
Recourse      
Guarantor Obligations [Line Items]      
Liability for estimated credit losses to loans sold with credit recourse 194   294
Gain (loss) from early extinguishment of debt 100 22  
Nonrecourse      
Guarantor Obligations [Line Items]      
Gain (loss) from early extinguishment of debt 2 $ (1,300)  
Loan serviced under representation warranties      
Guarantor Obligations [Line Items]      
Liability for estimated credit losses to loans sold with credit recourse $ 2,900   $ 3,400