MORTGAGE BANKING AND LOAN SERVICING -Mortgage Servicing Assets and Valuation Allowance - (Details) - Mortgage servicing rights - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Mortgage servicing assets and interest rate locks
Balance at the beginning of the period	$ 5,708	$ 5,155	$ 4,350
Servicing assets capitalized	1,525	988	1,527
Servicing rights acquired		594
Amortization of servicing assets	(1,313)	(1,004)	(1,472)
Change in valuation allowance	200	(25)	750
Balance at the end of the period	6,120	5,708	5,155
Valuation allowance:
Balance at the beginning of the period	400	375	1,125
Additions expensed	25	75
Reductions credited to operations	(225)	(50)	(750)
Balance at the end of the period	$ 200	$ 400	$ 375