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MORTGAGE SERVICING RIGHTS - Changes in mortgage servicing rights (Details) - Changes in mortgage servicing rights - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mortgage Servicing Rights    
Balance, beginning of period $ 339 $ 486
Originated 25 20
Amortization (1) [1] (68) (51)
Balance, end of period 296 455
Valuation Allowance    
Balance, beginning of period (23) (3)
Increase in impairment reserve (1) [1] (2) (20)
Balance, end of period (25) (23)
Mortgage servicing rights, net $ 271 $ 432
[1] (1) Amortization expense and changes in the impairment reserve are recorded in mortgage servicing, net, in the consolidated statements of income.