ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Dec. 31, 2010
Unrealized loss on securities available for sale without other than temporary impairment, opening balance	$ 7,688	$ 4,285
Unrealized loss on securities available for sale without other than temporary impairment, current period change	818	4,372
Unrealized loss on securities available for sale without other than temporary impairment, closing balance	8,506	8,657
Unrealized loss on securities available for sale with other than temporary impairment, opening balance	(523)	(1,425)
Unrealized loss on securities available for sale with other than temporary impairment, current period changes	523	1,138
Unrealized loss on securities available for sale with other than temporary impairment, closing balance	0	(287)
Total unrealized loss on securities available for sale, opening balance	8,506	8,370	7,165	2,860
Total unrealized loss on securities available for sale, current period changes	1,341	5,510
Total unrealized loss on securities available for sale, closing balance	8,506	8,370	7,165	2,860
Unrealized (loss) on defined benefit pension plans, opening balance	(2,026)	(1,510)
Unrealized (loss) on defined benefit pension plansUnrealized (loss) gain on defined benefit pension plans, current period changes	164	(60)
Unrealized (loss) on defined benefit pension plans, closing balance	(1,862)	(1,570)
Total, opening balance	5,139	1,350
Total, current period changes	1,505	5,450
Total, closing balance	$ 6,644	$ 6,800