BORROWINGS (Details) (USD $)												3 Months Ended				3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 0.52% borrowing, due August 2014	Mar. 31, 2013 0.41% borrowing, due September 2014	Mar. 31, 2013 0.43% borrowing, due December 2014	Mar. 31, 2013 0.49% borrowing, due March 2015	Mar. 31, 2013 0.45% borrowing, due April 2015	Mar. 31, 2013 0.68% borrowing, due August 2015	Mar. 31, 2013 0.62% borrowing, due March 2016	Mar. 31, 2013 0.75% borrowing, due September 2016	Mar. 31, 2013 0.94% borrowing, due June 2017	Mar. 31, 2013 3.62% borrowing, due November 2017	Mar. 31, 2013 3.87% borrowing, due November 2017	Mar. 31, 2013 2.83% borrowing, due on December 2017	Mar. 31, 2013 FHLB of Pittsburgh	Mar. 31, 2013 FHLB of Pittsburgh Minimum	Mar. 31, 2013 FHLB of Pittsburgh Maximum	Mar. 31, 2013 Federal Reserve Bank of Philadelphia	Mar. 31, 2013 FHLB advances
Borrowings
Securities pledged as collateral																			$ 199,500,000
Federal Home Loan Bank advances	140,000,000	110,000,000	10,000,000	15,000,000	15,000,000	10,000,000	10,000,000	10,000,000	10,000,000	5,000,000	5,000,000	15,000,000	15,000,000	20,000,000
Interest rate (as a percent)	1.55%		0.52%	0.41%	0.43%	0.49%	0.45%	0.68%	0.62%	0.75%	0.94%	3.62%	3.87%	2.83%
Reference rate, description												LIBOR	LIBOR	LIBOR
Interest rate added to reference rate (as a percent)												0.10%	0.10%	0.11%
Maximum borrowing capacity															381,500,000			52,700,000
Capital stock to be held as percentage of advances																4.60%	6.00%
Capital stock to be held as percentage of eligible assets																0.35%	1.00%
Stock obligation																8,700,000	14,700,000
FHLB stock	$ 9,707,000	$ 8,097,000