LOANS AND ALLOWANCE - Loans where there was a payment default within twelve months following the modification - (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($) loan	Sep. 30, 2017 USD ($) loan	Sep. 30, 2016 USD ($) loan
Loans by class modified as troubled debt restructurings for which there was a payment default within twelve months following the modification
Number of Loans | loan		1	4	3
Recorded Investment		$ 104	$ 401	$ 375
Period of contractually past due loans under the modified terms, to be considered in payment default			90 days
Additional disclosures
Recorded investment in loans modified other than troubled debt restructurings	$ 4,616	$ 7,895	$ 12,916	$ 10,784
Commercial real estate | Other
Loans by class modified as troubled debt restructurings for which there was a payment default within twelve months following the modification
Number of Loans | loan				1
Recorded Investment				$ 125
Residential | 1-4 family
Loans by class modified as troubled debt restructurings for which there was a payment default within twelve months following the modification
Number of Loans | loan		1	1	2
Recorded Investment		$ 104	$ 79	$ 250
Commercial | Other
Loans by class modified as troubled debt restructurings for which there was a payment default within twelve months following the modification
Number of Loans | loan			3
Recorded Investment			$ 322