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OTHER ASSETS - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Servicing Asset at Amortized Cost [Line Items]      
Weighted average discount rate 11.99%    
Servicing asset at amortized cost, additions $ 16,837 $ 10,660  
Servicing asset at amortized cost, change in fair value 5,822 (29)  
Servicing asset at amortized cost, allowance adjustment $ (4,700) (550)  
Minimum      
Servicing Asset at Amortized Cost [Line Items]      
Pre-payment speed 7.74%    
Maximum      
Servicing Asset at Amortized Cost [Line Items]      
Pre-payment speed 11.29%    
Continuing Operations      
Servicing Asset at Amortized Cost [Line Items]      
Mortgage loans sold and serviced for others $ 1,700,000 1,400,000 $ 1,400,000
Servicing fees 5,600 4,600 4,400
Discontinued Operations      
Servicing Asset at Amortized Cost [Line Items]      
Mortgage loans sold and serviced for others 1,400,000 800,000 300,000
Servicing fees 1,900 1,000 $ 200
Servicing asset at amortized cost, additions 11,100 $ 7,600  
Servicing asset at amortized cost, change in fair value (5,800)    
Servicing asset at amortized cost, allowance adjustment $ (4,500)