SELECTED QUARTERLY FINANCIAL INFORMATION (Financial Information) (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015
Interest income	$ 7,761	$ 7,422	$ 7,147	$ 7,126	$ 7,139	$ 6,915	$ 6,924	$ 7,009	$ 29,456	$ 27,987
Interest expense	1,056	1,115	1,028	968	962	933	952	931	4,167	3,778
Net interest income	6,705	6,307	6,119	6,158	6,177	5,982	5,972	6,078	25,289	24,209
Provision for loan losses	209	303	125	0	232	208	212	207	637	859
Net interest income after provision for loan losses	6,496	6,004	5,994	6,158	5,945	5,774	5,760	5,871	24,652	23,350
Noninterest income	3,242	(2,576)	1,262	1,444	1,850	1,937	1,078	1,111	3,372	5,976
Noninterest expenses	5,721	5,590	5,232	5,892	5,552	5,197	4,876	5,374	22,435	20,999
Income (loss) before income taxes	4,017	(2,162)	2,024	1,710	2,243	2,514	1,962	1,608	5,589	8,327
Income tax expense (benefit)	1,211	(4,389)	389	467	415	318	435	408	(2,322)	1,576
Net income	2,806	2,227	1,635	1,243	1,828	2,196	1,527	1,200	7,911	6,751
Less: Preferred stock dividends declared	0	0	19	43	42	43	43	43	62	171
Net income available to common shareholders	$ 2,806	$ 2,227	$ 1,616	$ 1,200	$ 1,786	$ 2,153	$ 1,484	$ 1,157	$ 7,849	$ 6,580
Net income per common share, basic	$ 1.27	$ 1.01	$ 0.73	$ 0.55	$ 0.83	$ 1	$ 0.69	$ 0.55	$ 3.57	$ 3.07
Net income per common share, diluted	$ 1.22	$ 0.97	$ 0.7	$ 0.52	$ 0.8	$ 0.95	$ 0.66	$ 0.52	$ 3.41	$ 2.93