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MORTGAGE BANKING ACTIVITIES - COMPONENTS OF INCOME (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Mortgage servicing rights        
Net gain realized on sale of mortgage loans held for sale $ 1,173 $ 1,266 $ 2,114 $ 2,107
Net gain recognized 1,278 1,465 2,256 2,560
Loan servicing income 528 473 1,063 944
Amortization of mortgage servicing rights (361) (378) (714) (683)
Net servicing income recognized 167 95 349 261
Total Mortgage Banking income 1,445 1,560 2,605 2,821
Mortgage loans held for sale        
Mortgage servicing rights        
Net change in fair value 118 39 111 98
Rate lock loan commitments        
Mortgage servicing rights        
Net change in fair value (36) 260 283 535
Mandatory forward contracts        
Mortgage servicing rights        
Net change in fair value $ 23 $ (100) $ (252) $ (180)