EARNINGS PER SHARE - Computation of earning per share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Basic earnings per share
Income available to common stockholders (in dollars)	$ 1,050	$ 1,097	$ 2,025	$ 2,013
Income available to common stockholders (in shares)	1,537,229	1,526,042	1,535,292	1,525,460
Income available to common stockholders (in dollars per share)	$ 0.68	$ 0.72	$ 1.32	$ 1.32
Effect of dilutive stock options (in shares)	3,872	5,405	4,254	4,672
Diluted earnings per share
Income available to common stockholders and assumed conversions (in dollars)	$ 1,050	$ 1,097	$ 2,025	$ 2,013
Income available to common stockholders and assumed conversions (in shares)	1,541,101	1,531,447	1,539,546	1,530,132
Income available to common stockholders and assumed conversions (in dollars per share)	$ 0.68	$ 0.72	$ 1.32	$ 1.32