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SECURITIZATIONS (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
SECURITIZATIONS    
Mortgage servicing rights $ 15,843 $ 15,779
Significant Other Observable Inputs (Level 2)    
SECURITIZATIONS    
Mortgage servicing rights 0 0
Residential mortgage | Significant Other Observable Inputs (Level 2)    
SECURITIZATIONS    
Mortgage servicing rights 1,500 2,000
Unrealized gains recorded in AOCI $ 100 $ 100