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SECURITIZATIONS (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
SECURITIZATIONS    
Mortgage servicing rights $ 15,821 $ 15,843
Significant Other Observable Inputs (Level 2)    
SECURITIZATIONS    
Mortgage servicing rights 0 0
Real estate, Mortgage - residential | Significant Other Observable Inputs (Level 2)    
SECURITIZATIONS    
Mortgage servicing rights 1,300 1,500
Unrealized gains recorded in AOCI $ 100 $ 100