LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Impaired Loans (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, With no related allowance recorded	$ 6,895		$ 5,062
Unpaid Principal Balance, With related allowance recorded	2,148		1,256
Recorded Investment	9,043		6,318
Recorded Investment [Abstract]
Recorded Investment, With no related allowance recorded	6,895		5,062
Recorded Investment, With related allowance recorded	2,148		1,256
Unpaid Principal Balance	9,043		6,318
Related Allowance [Abstract]
Related Allowance	733		253
Average Recorded Investment [Abstract]
Average Recorded Investment, With no related allowance recorded	8,436		3,695
Average Recorded Investment, With related allowance recorded	1,452		4,118
Average Recorded Investment	9,888		7,813
Interest income	0	$ 0
Cash-based interest income	0	$ 0
Commercial and industrial
Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, With no related allowance recorded	712		28
Unpaid Principal Balance, With related allowance recorded	462		203
Recorded Investment [Abstract]
Recorded Investment, With no related allowance recorded	712		28
Recorded Investment, With related allowance recorded	462		203
Related Allowance [Abstract]
Related Allowance	246		64
Average Recorded Investment [Abstract]
Average Recorded Investment, With no related allowance recorded	345		809
Average Recorded Investment, With related allowance recorded	533		3,153
Construction and development
Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, With no related allowance recorded	0		1,825
Recorded Investment [Abstract]
Recorded Investment, With no related allowance recorded	0		1,825
Average Recorded Investment [Abstract]
Average Recorded Investment, With no related allowance recorded	608		172
Commercial real estate
Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, With no related allowance recorded	3,468		1,196
Unpaid Principal Balance, With related allowance recorded	283
Recorded Investment [Abstract]
Recorded Investment, With no related allowance recorded	3,468		1,196
Recorded Investment, With related allowance recorded	283
Related Allowance [Abstract]
Related Allowance	31
Average Recorded Investment [Abstract]
Average Recorded Investment, With no related allowance recorded	5,177		871
Average Recorded Investment, With related allowance recorded	173
Farmland
Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, With no related allowance recorded	7		89
Unpaid Principal Balance, With related allowance recorded	163		169
Recorded Investment [Abstract]
Recorded Investment, With no related allowance recorded	7		89
Recorded Investment, With related allowance recorded	163		169
Related Allowance [Abstract]
Related Allowance	92		47
Average Recorded Investment [Abstract]
Average Recorded Investment, With no related allowance recorded	90		109
Average Recorded Investment, With related allowance recorded	109		169
1-4 family residential
Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, With no related allowance recorded	1,785		1,799
Unpaid Principal Balance, With related allowance recorded	941		789
Recorded Investment [Abstract]
Recorded Investment, With no related allowance recorded	1,785		1,799
Recorded Investment, With related allowance recorded	941		789
Related Allowance [Abstract]
Related Allowance	139		108
Average Recorded Investment [Abstract]
Average Recorded Investment, With no related allowance recorded	1,566		1,575
Average Recorded Investment, With related allowance recorded	505		639
Multi-family residential
Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, With no related allowance recorded	241		5
Recorded Investment [Abstract]
Recorded Investment, With no related allowance recorded	241		5
Average Recorded Investment [Abstract]
Average Recorded Investment, With no related allowance recorded	172		2
Consumer
Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, With no related allowance recorded	192		105
Unpaid Principal Balance, With related allowance recorded	0		95
Recorded Investment [Abstract]
Recorded Investment, With no related allowance recorded	192		105
Recorded Investment, With related allowance recorded	0		95
Related Allowance [Abstract]
Related Allowance	0		34
Average Recorded Investment [Abstract]
Average Recorded Investment, With no related allowance recorded	91		89
Average Recorded Investment, With related allowance recorded	50		155
Agricultural
Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, With no related allowance recorded	490		15
Unpaid Principal Balance, With related allowance recorded	299		0
Recorded Investment [Abstract]
Recorded Investment, With no related allowance recorded	490		15
Recorded Investment, With related allowance recorded	299		0
Related Allowance [Abstract]
Related Allowance	225		0
Average Recorded Investment [Abstract]
Average Recorded Investment, With no related allowance recorded	387		68
Average Recorded Investment, With related allowance recorded	$ 82		$ 2