EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Basic earnings per share [Abstract]
Income available to common stockholders									$ 10,155	$ 5,947	$ 7,923
Weighted average common shares outstanding (in shares)									7,940,892	7,937,143	7,937,143
Earnings per share (in dollars per share)	$ 0.36	$ 0.38	$ 0.23	$ 0.32	$ 0.30	$ 0.19	$ 0.09	$ 0.17	$ 1.28	$ 0.75	$ 1.00
Diluted earnings per share [Abstract]
Income available to common stockholders									$ 10,155	$ 5,947	$ 7,923
Weighted average common shares outstanding (in shares)									7,940,892	7,937,143	7,937,143
Add dilutive effects of potential additional common stock (in shares)									240,611	97,936	185,559
Weighted average common and dilutive potential Common shares outstanding (in shares)									8,181,503	8,035,079	8,122,702
Earnings per share assuming dilution (in dollars per share)	$ 0.34	$ 0.37	$ 0.22	$ 0.31	$ 0.30	$ 0.19	$ 0.09	$ 0.17	$ 1.24	$ 0.74	$ 0.98
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities not considered in computing diluted earnings per share (in shares)									183,699	312,449	213,049