INCOME TAXES - Summary of income tax provision (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current
Federal	$ 1,782	$ 1,965	$ 1,901
State	116	275	239
Current income tax expense, Total	1,898	2,240	2,140
Deferred
Federal	(761)	(299)	(691)
State	2	(213)	(234)
Change in allowance	(4)	174	18
Deferred income tax expense, Total	(763)	(338)	(907)
Income tax expense	$ 1,135	$ 1,902	$ 1,233