SHORT-TERM BORROWINGS - Schedule of Short-term borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
SHORT-TERM BORROWINGS
Balance at year end	$ 46,638	$ 40,818
Line of Credit
SHORT-TERM BORROWINGS
Additional lines of credit available from correspondent banks other than the FHLB	35,413
Repurchase Agreements
SHORT-TERM BORROWINGS
Balance at year end	18,334	13,987	$ 12,391
Maximum amount outstanding at any month end	18,614	18,801	16,632
Average balance outstanding during the year	$ 15,834	$ 16,350	$ 16,839
Weighted-average interest rate: At year end (as a percent)	0.21%	0.23%	0.28%
Weighted-average interest rate: Paid during the year (as a percent)	0.21%	0.22%	0.40%
Open Repo Plus
SHORT-TERM BORROWINGS
Balance at year end	$ 28,304	$ 26,831	$ 14,325
Maximum amount outstanding at any month end	42,760	26,831	21,350
Average balance outstanding during the year	$ 23,075	$ 5,992	$ 5,508
Weighted-average interest rate: At year end (as a percent)	0.43%	0.27%	0.25%
Weighted-average interest rate: Paid during the year (as a percent)	0.36%	0.30%	0.31%