MERGERS AND ACQUISITIONS - Pro forma results of operations of Riverside Bank since acquisition date (Details) - Pro forma results of operations of Riverside Bank since acquisition date - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Total revenue	$ 39,841	$ 39,640
Net income	6,411	7,136
Net income available to common shareholders	$ 6,245	$ 6,975
Earnings per share
Basic	$ 2.26	$ 2.59
Diluted	$ 2.24	$ 2.57