COMPREHENSIVE INCOME - Components of comprehensive income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Equity [Abstract]
Net income	$ 4,077	$ 4,112	$ 3,660
Other comprehensive income
Net unrealized gains on securities available-for-sale	2,632	5,973	1,908
Reclassification of net realized gains in net income	(297)	(11)	(16)
Unrealized gains on securities available-for-sale	2,353	5,962	1,892
Income tax expense	(800)	(2,027)	(643)
Unrealized gains on securities available-for-sale, net of tax	1,553	3,935	1,249
Pension plan income (loss)	2,407	(1,319)	91
Income tax (expense) benefit	(818)	448	(31)
Pension plan income (loss), net of tax	1,589	(871)	60
Other comprehensive income, net of tax	3,142	3,064	1,309
Comprehensive income	$ 7,219	$ 7,176	$ 4,969