SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended												12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) [Abstract]
Interest income	$ 9,803	$ 9,825	$ 9,718	$ 9,630	$ 8,234	$ 9,149	$ 10,299	$ 9,615	$ 9,879	$ 9,980	$ 9,580	$ 9,620
Interest expense	642	666	813	833	841	857	888	977	1,089	1,153	1,163	1,342	2,954	3,563	4,747
Net interest income	9,161	9,159	8,905	8,797	7,393	8,292	9,411	8,638	8,790	8,827	8,417	8,278	36,022	33,734	34,312
Provision for loan losses	300	0	(300)	0	0	150	200	699	253	(161)	214	(28)	0	1,049	278
Net income (loss)	$ 3,474	$ 3,672	$ 3,147	$ 3,125	$ 1,666	$ 2,387	$ 9,970	$ 3,091	$ 2,192	$ (1,020)	$ 2,747	$ 721	$ 13,418	$ 17,114	$ 4,640
Earnings (loss) per common and common equivalent share
Basic (in dollars per share)	$ 0.59	$ 0.67	$ 0.57	$ 0.57	$ 0.18	$ 0.67	$ 3.12	$ 0.97	$ 0.81	$ (0.33)	$ 0.88	$ 0.23	$ 2.40	$ 4.94	$ 1.49
Diluted (in dollars per share)	$ 0.58	$ 0.66	$ 0.57	$ 0.57	$ 0.19	$ 0.66	$ 3.10	$ 0.97	$ 0.81	$ (0.33)	$ 0.88	$ 0.23	$ 2.38	$ 4.92	$ 1.49
Dividend declared per share (in dollars per share)	$ 0.13	$ 0.13	$ 0.13	$ 0.13	$ 0.13	$ 0.13	$ 0.13	$ 0.13	$ 0.13	$ 0.13	$ 0.13	$ 0.13