DERIVATIVES AND HEDGING (Details) (USD $)	0 Months Ended			0 Months Ended	3 Months Ended			3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Nov. 03, 2006 Interest rate swap maturing in April 2022	Mar. 31, 2013 Interest rate swap maturing in April 2022	Dec. 31, 2012 Interest rate swap maturing in April 2022	Oct. 12, 2011 Interest rate swap maturing in October 2021	Mar. 31, 2013 Interest rate swap maturing in October 2021	Mar. 31, 2012 Interest rate swap maturing in October 2021	Dec. 31, 2012 Interest rate swap maturing in October 2021	Mar. 31, 2013 Credit Derivatives (Interest Rate Swap Underlyings) item	Dec. 31, 2012 Credit Derivatives (Interest Rate Swap Underlyings) item	Mar. 31, 2013 Credit Derivatives (Foreign Currency Swap Underlyings) item	Dec. 31, 2012 Credit Derivatives (Foreign Currency Swap Underlyings) item
Derivative
Notional amount, interest rate swap derivative		$ 932,000			$ 1,600,000
Notional amount of Credit Swap derivative (Protection Sold)								13,200,000	13,300,000	46,000
Fixed rate loan term	15 years			10 years
Fixed interest rate to be paid under hedge (as a percent)	7.43%			5.83%
Variable interest rate basis	one-month LIBOR			one-month LIBOR
Margin added to derivative interest rate (as a percent)	2.24%			3.50%
Fair value loss position on interest rate swap derivative		188,000	203,000		87,000		105,000
Hedge ineffectiveness, income					4,000	6,000
Number of derivative transactions								4	4	2	0
Fair value of swap liability								100,000	213,000	2,000
Derivative liability								12,000	12,000	0
Remaining maturity period, minimum								6 years	7 years
Remaining maturity period, maximum								10 years	10 years
Remaining maturity period										1 month
Recognized income								$ 1,000	$ 0	$ 2,000	$ 24,000