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	6 Months Ended		12 Months Ended	6 Months Ended		12 Months Ended	6 Months Ended		12 Months Ended	6 Months Ended		12 Months Ended	6 Months Ended		12 Months Ended	6 Months Ended		12 Months Ended	6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2013	Sep. 30, 2013 Commercial Loan [Member]	Sep. 30, 2012 Commercial Loan [Member]	Mar. 31, 2013 Commercial Loan [Member]	Sep. 30, 2013 One- to four family loans [Member]	Sep. 30, 2012 One- to four family loans [Member]	Mar. 31, 2013 One- to four family loans [Member]	Sep. 30, 2013 Multifamily Loans [Member]	Sep. 30, 2012 Multifamily Loans [Member]	Mar. 31, 2013 Multifamily Loans [Member]	Sep. 30, 2013 Commercial Real Estate Portfolio Segment [Member]	Sep. 30, 2012 Commercial Real Estate Portfolio Segment [Member]	Mar. 31, 2013 Commercial Real Estate Portfolio Segment [Member]	Sep. 30, 2013 Construction Loans [Member]	Sep. 30, 2012 Construction Loans [Member]	Mar. 31, 2013 Construction Loans [Member]	Sep. 30, 2013 Consumer Loan [Member]	Sep. 30, 2012 Consumer Loan [Member]	Mar. 31, 2013 Consumer Loan [Member]	Sep. 30, 2013 Unallocated Financing Receivables [Member]	Sep. 30, 2012 Unallocated Financing Receivables [Member]	Mar. 31, 2011 Unallocated Financing Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable			$ 10,989	$ 19,821	$ 19,821	$ 3,759	$ 1,786	$ 1,786	$ 3,496	$ 4,305	$ 4,305	$ 408	$ 5,409	$ 5,409	$ 3,298	$ 6,709	$ 6,709	$ 0	$ 1,532	$ 1,532	$ 28	$ 80	$ 80	$ 0		$ 0
Charge-offs	(2,539)	(4,206)	(2,539)	(4,206)	5,903	(393)	(1,198)	2,274	(1,619)	(1,633)	2,103	0	(225)	226	(512)	(1,148)	1,148	0	0	151	(15)	(2)	1	0	0
Recoveries			623	9	398	96	6	265	502	0	15	16	0	91	0	0	0	0	0	22	9	3	5	0	0
Provision for loan losses	(505)	560	326	784	(3,327)	(1,860)	3,020	3,982	1,844	2,037	1,279	(30)	(2,545)	(4,866)	102	(513)	(2,263)	210	(1,226)	(1,403)	7	(37)	(56)	53	48
Loans and Leases Receivable	9,399	16,408	9,399	16,408	10,989	1,602	3,614	3,759	4,223	4,709	3,496	394	2,639	408	2,888	5,048	3,298	210	306	0	29	44	28	53	48	0
Allowance for Credit Losses, Collectively Evaluated for Impairment	8,048	14,127	8,048	14,127	8,678	1,147	1,944	1,959	3,556	4,582	3,179	394	2,590	409	2,659	4,613	3,103	210	306	0	29	44	28	53	48
Allowance for Credit Losses, Individually Evaluated for Impairment	1,351	2,281	1,351	2,281	2,311	455	1,670	1,800	667	127	317	0	49	0	229	435	194	0	0	0	0	0	0	0
Loans, net	399,041	379,950	399,041	379,950	370,122	29,731	36,097	35,277	121,448	61,948	73,987	54,368	73,515	56,607	188,124	199,641	202,771	5,142	8,297	1,230	228	452	250	0	0
Ending balance, Collectively Evaluated for Impairment	375,253	354,170	375,253	354,170	339,100	25,146	30,544	28,904	115,362	59,024	67,619	52,994	72,837	55,991	176,456	187,274	186,336	5,067	4,039	0	228	452	250	0	0
Ending balance Individually Evaluated for Impairment	$ 23,788	$ 25,780	$ 23,788	$ 25,780	$ 31,022	$ 4,585	$ 5,553	$ 6,373	$ 6,086	$ 2,924	$ 6,368	$ 1,374	$ 678	$ 616	$ 11,668	$ 12,367	$ 16,435	$ 75	$ 4,258	$ 1,230	$ 0	$ 0	$ 0	$ 0	$ 0