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GUARANTEES (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Guarantor Obligations [Line Items]          
Acquired standby letters of credit and financial guarantees $ 28,700   $ 28,700   $ 25,200
Repurchased GNMA 711 $ 887 1,400 $ 1,900  
Repurchased loans not subject to credit recourse provision 7,500 9,900 15,300 22,500  
Gain (loss) from early extinguishment of debt 0 0 42 0  
Amount of serviced loans 5,700,000   5,700,000   5,700,000
Funds advanced to investors under servicing agreements 11,500   11,500   12,900
Recourse          
Guarantor Obligations [Line Items]          
Unpaid principal balance of residential subject loans subject to credit recourse 115,600   115,600   121,800
Liability for estimated credit losses to loans sold with credit recourse 174   174   294
Gain (loss) from early extinguishment of debt 21 (90) 121 (68)  
Nonrecourse          
Guarantor Obligations [Line Items]          
Gain (loss) from early extinguishment of debt (53) $ (1,400) (51) $ (2,800)  
Loan serviced under representation warranties | Nonrecourse          
Guarantor Obligations [Line Items]          
Unpaid principal balance of residential subject loans subject to credit recourse $ 1,900   $ 1,900   $ 3,400