LOANS AND ALLOWANCE - Purchased Credit Impaired Loans for Which it Was Probable at Acquisition That All Contractually Required Payments Would Not be Collected (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Dec. 31, 2016
Carrying amount of purchased credit impaired loans
Commercial	$ 15,733		$ 15,733	$ 10,817
1-4 Family	2,380		2,380	2,399
Outstanding Balance	18,113		18,113	13,216
Carrying amount, net of allowance	11,245		11,245	8,954
Allowance for loan losses on loans acquired in transfer	203		203	0
Increase in allowance for loan losses on loans acquired in transfer	0	$ 0
Contractually required payments receivable of loans purchased during the year
Commercial	8,968		8,968	12,907
1-4 Family	274		274	3,268
Total contractually required payments receivable	9,242		9,242	16,175
Fair value of acquired loans at acquisition	6,927		6,927	$ 11,560
Accretable yield, or income to be collected
New loans purchased			526
Accretion of income			(155)
Balance at end of period	$ 371		$ 371