LOANS - Troubled debt restructurings (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Quantity
Residential real estate		$ 1
Commercial real estate	2	5
Commercial and industrial
Troubled debt restructurings	2	6
Rate reduction and term extension	2	2
Debt consolidation and term extension		3
Seasonal interest only concession		1
Troubled debt restructurings	2	6
Pre-modification balance
Residential real estate		326
Commercial real estate	1,022	559
Commercial and industrial
Troubled debt restructurings	1,022	1,105
Rate reduction and term extension	1,022	373
Debt consolidation and term extension		706
Seasonal interest only concession		26
Troubled debt restructurings	1,022	1,105
Post-modification balance
Residential real estate		326
Commercial real estate	1,022	559
Commercial and industrial
Troubled debt restructurings	1,022	1,105
Rate reduction and term extension	1,022	373
Debt consolidation and term extension		706
Seasonal interest only concession		26
Troubled debt restructurings	$ 1,022	$ 1,105