MORTGAGE SERVICING RIGHTS (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Servicing Assets at Fair Value [Line Items]    
Total loans serviced for others $ 5,644,509 $ 5,475,804
Commercial FHA Mortgage Loans    
Servicing Assets at Fair Value [Line Items]    
Total loans serviced for others 3,811,066 3,649,524
Residential mortgage loans    
Servicing Assets at Fair Value [Line Items]    
Total loans serviced for others $ 1,833,443 $ 1,826,280