Loans, Allowance for Loan Losses and Impaired Loans (Details 4) (USD $) In Thousands, unless otherwise specified	6 Months Ended				12 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Sep. 30, 2014
Troubled Debt Restructuring
Beginning balance	$ 5,581		$ 8,618		$ 8,618
Principal payments	(640)		(1,595)		(2,568)
Charge-offs	(49)		(401)		(519)
Advances	10		0		10
New restructured	31	[1]	40	[1]	80	[1]
Class Transfers	(181)	[2]	15	[2]	(40)	[2]
Transfers between accrual/non-accrual	0		0		0
Ending balance	4,752		6,677		5,581
Real Estate [Member]
Troubled Debt Restructuring
Beginning balance	4,737		7,441		7,441
Principal payments	(500)		(1,400)		(2,272)
Charge-offs	(16)		(342)		(437)
Advances	10		0		10
New restructured	17	[1]	0	[1]	40	[1]
Class Transfers	(181)	[2]	15	[2]	(45)	[2]
Transfers between accrual/non-accrual	0		0		0
Ending balance	4,067		5,714		4,737
Consumer and Other Loans [Member]
Troubled Debt Restructuring
Beginning balance	844		1,177		1,177
Principal payments	(140)		(195)		(296)
Charge-offs	(33)		(59)		(82)
Advances	0		0		0
New restructured	14	[1]	40	[1]	40	[1]
Class Transfers	0	[2]	0	[2]	5	[2]
Transfers between accrual/non-accrual	0		0		0
Ending balance	685		963		844
Performing [Member]
Troubled Debt Restructuring
Beginning balance	5,332		7,355		7,355
Principal payments	(534)		(803)		(1,015)
Charge-offs	(2)		(41)		(41)
Advances	10		0		7
New restructured	31	[1]	24	[1]	64	[1]
Class Transfers	(181)	[2]	0	[2]	(60)	[2]
Transfers between accrual/non-accrual	(42)		(280)		(978)
Ending balance	4,614		6,255		5,332
Performing [Member] | Real Estate [Member]
Troubled Debt Restructuring
Beginning balance	4,535		6,254		6,254
Principal payments	(398)		(633)		(757)
Charge-offs	0		(11)		(11)
Advances	10		0		7
New restructured	17	[1]	0	[1]	40	[1]
Class Transfers	(181)	[2]	0	[2]	(60)	[2]
Transfers between accrual/non-accrual	0		(259)		(938)
Ending balance	3,983		5,351		4,535
Performing [Member] | Consumer and Other Loans [Member]
Troubled Debt Restructuring
Beginning balance	797		1,101		1,101
Principal payments	(136)		(170)		(258)
Charge-offs	(2)		(30)		(30)
Advances	0		0		0
New restructured	14	[1]	24	[1]	24	[1]
Class Transfers	0	[2]	0	[2]	0	[2]
Transfers between accrual/non-accrual	(42)		(21)		(40)
Ending balance	631		904		797
Non Performing Loans [Member]
Troubled Debt Restructuring
Beginning balance	249		1,263		1,263
Principal payments	(106)		(792)		(1,553)
Charge-offs	(47)		(360)		(478)
Advances	0		0		3
New restructured	0		16	[1]	16	[1]
Class Transfers	0		15	[2]	20	[2]
Transfers between accrual/non-accrual	42		280		978
Ending balance	138		422		249
Non Performing Loans [Member] | Real Estate [Member]
Troubled Debt Restructuring
Beginning balance	202		1,187		1,187
Principal payments	(102)		(767)		(1,515)
Charge-offs	(16)		(331)		(426)
Advances	0		0		3
New restructured	0		0	[1]	0	[1]
Class Transfers	0		15	[2]	15	[2]
Transfers between accrual/non-accrual	0		259		938
Ending balance	84		363		202
Non Performing Loans [Member] | Consumer and Other Loans [Member]
Troubled Debt Restructuring
Beginning balance	47		76		76
Principal payments	(4)		(25)		(38)
Charge-offs	(31)		(29)		(52)
Advances	0		0		0
New restructured	0		16	[1]	16	[1]
Class Transfers	0		0	[2]	5	[2]
Transfers between accrual/non-accrual	42		21		40
Ending balance	$ 54		$ 59		$ 47

[1] “New restructured” represent loans restructured during the current period that met TDR criteria in accordance with the Bank’s policy at the time of the restructuring.

[2] “Class transfers out” represent previously restructured loans