Loan Receivable and Allowance for Loan and Lease Losses Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses	$ 7,066	$ 10,317	$ 7,233	$ 10,989	$ 10,989
Charge-off	0	1,002	83	2,539	4,540
Recoveries	244	589	941	623	1,210
Provision for loan losses	(713)	(505)	(1,494)	326	(426)
Allowance for loan losses	6,597	9,399	6,597	9,399	7,233
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	4,610	8,048	4,610	8,048	5,602
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1,987	1,351	1,987	1,351	1,631
Loans Receivable Ending Balance	410,435	399,041	410,435	399,041	389,956
Financing Receivable, Collectively Evaluated for Impairment	393,419	375,253	393,419	375,253	367,454
Financing Receivable, Individually Evaluated for Impairment	17,016	23,788	17,016	23,788	22,502
One- to four family loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses	3,923	4,295	3,377	3,496	3,496
Charge-off	0	(1,002)	(83)	(1,619)	(2,887)
Recoveries	25	502	379	502	534
Provision for loan losses	(647)	428	(372)	1,844	2,234
Allowance for loan losses	3,301	4,223	3,301	4,223	3,377
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	2,110	3,556	2,110	3,556	2,857
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1,191	667	1,191	667	520
Loans Receivable Ending Balance	119,142	121,448	119,142	121,448	112,191
Financing Receivable, Collectively Evaluated for Impairment	112,350	115,362	112,350	115,362	105,719
Financing Receivable, Individually Evaluated for Impairment	6,792	6,086	6,792	6,086	6,472
Multifamily Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses	336	245	308	408	408
Charge-off	0	0	0	0	(98)
Recoveries	74	6	82	16	31
Provision for loan losses	(38)	143	(18)	(30)	(33)
Allowance for loan losses	372	394	372	394	308
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	201	394	201	394	216
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	171	0	171	0	92
Loans Receivable Ending Balance	54,098	54,368	54,098	54,368	47,525
Financing Receivable, Collectively Evaluated for Impairment	52,606	52,994	52,606	52,994	45,285
Financing Receivable, Individually Evaluated for Impairment	1,492	1,374	1,492	1,374	2,240
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses	813	2,991	1,835	3,298	3,298
Charge-off	0	0	0	(512)	(574)
Recoveries	53	0	254	0	0
Provision for loan losses	288	(103)	(935)	102	(889)
Allowance for loan losses	1,154	2,888	1,154	2,888	1,835
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	1,149	2,659	1,149	2,659	1,580
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	5	229	5	229	255
Loans Receivable Ending Balance	190,573	188,124	190,573	188,124	198,101
Financing Receivable, Collectively Evaluated for Impairment	186,324	176,456	186,324	176,456	189,317
Financing Receivable, Individually Evaluated for Impairment	4,249	11,668	4,249	11,668	8,784
Construction Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses	201	167	0	0	0
Charge-off	0	0	0	0	0
Recoveries	0	0	0	0	149
Provision for loan losses	13	43	214	210	(149)
Allowance for loan losses	214	210	214	210	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	214	210	214	210	0
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0	0	0	0
Loans Receivable Ending Balance	5,075	5,142	5,075	5,142	5,070
Financing Receivable, Collectively Evaluated for Impairment	5,075	5,067	5,075	5,067	5,070
Financing Receivable, Individually Evaluated for Impairment	0	75	0	75	0
Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses	1,780	2,603	1,705	3,759	3,759
Charge-off	0	0	0	(393)	(966)
Recoveries	90	72	223	96	486
Provision for loan losses	(335)	(1,073)	(393)	(1,860)	(1,574)
Allowance for loan losses	1,535	1,602	1,535	1,602	1,705
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	916	1,147	916	1,147	941
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	619	455	619	455	764
Loans Receivable Ending Balance	41,194	29,731	41,194	29,731	26,931
Financing Receivable, Collectively Evaluated for Impairment	36,721	25,146	36,721	25,146	21,926
Financing Receivable, Individually Evaluated for Impairment	4,473	4,585	4,473	4,585	5,005
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses	13	16	8	28	28
Charge-off	0	0	0	(15)	(15)
Recoveries	2	9	3	9	10
Provision for loan losses	6	4	10	7	(15)
Allowance for loan losses	21	29	21	29	8
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	20	29	20	29	8
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1	0	1	0	0
Loans Receivable Ending Balance	353	228	353	228	138
Financing Receivable, Collectively Evaluated for Impairment	343	228	343	228	137
Financing Receivable, Individually Evaluated for Impairment	10	0	10	0	1
Unallocated Financing Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses		0		0	0
Charge-off		0		0
Recoveries		0		0
Provision for loan losses		53		53
Allowance for loan losses		53		53
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment		53		53
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		0		0
Loans Receivable Ending Balance		0		0
Financing Receivable, Collectively Evaluated for Impairment		0		0
Financing Receivable, Individually Evaluated for Impairment		$ 0		$ 0