INVESTMENT IN HISTORIC TAX CREDIT ENTITY (Additional Information) (Detail) - USD ($)		3 Months Ended								12 Months Ended
	Oct. 15, 2014	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
Percentage Of Received Equity Interest	99.00%
Percentage Of Receive Operating Profit And Losses	99.00%
Investment Credit Available To Be Estimated	$ 4,700,000
Other Assets	$ 4,200,000	$ 3,956,000				$ 7,952,000				$ 3,956,000	$ 7,952,000
Description Of Investment In Credit										The Banks total investment in the entity will be $4.2 million, or 90% of the anticipated credits to be received by the entity. At September 30, 2016, the Bank had made all of its required investments to the entity except for $118,000, which is due when the project is fully completed and the final certificate of occupancy is received.
Investment Tax Credit										$ 4,236,000	0
Historical Tax Credit On Investment										4,700,000
Income Tax Credits and Adjustments										332,000
Net Income (Loss) Attributable to Parent		2,806,000	$ 2,227,000	$ 1,635,000	$ 1,243,000	1,828,000	$ 2,196,000	$ 1,527,000	$ 1,200,000	7,911,000	6,751,000
Equity [Member]
Tax Credit Carryforward, Amount		4,400,000				834,000				4,400,000	834,000
Liability [Member]
Tax Credit Carryforward, Amount		112,000				119,000				112,000	119,000
Assets [Member]
Tax Credit Carryforward, Amount		4,500,000				953,000				4,500,000	953,000
Investment In Credit [Member]
Other Assets						4,200,000					4,200,000
Other Liabilities		$ 118,000				$ 3,300,000				118,000	$ 3,300,000
Revenues										1,100,000
Net Income (Loss) Attributable to Parent										$ 244,000