Loan Receivable and Allowance for Loan and Lease Losses Past due financing receivable (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	$ 1,968	$ 3,823
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	1,293	1,313
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	5,559	8,988
Financing Receivable, Recorded Investment, Past Due	8,820	14,124
Financing Receivable, Recorded Investment, Current	382,066	375,832
Loans Receivable, Net	390,886	389,956
One- to four family loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	970	244
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	438	888
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	1,887	1,863
Financing Receivable, Recorded Investment, Past Due	3,295	2,995
Financing Receivable, Recorded Investment, Current	106,277	109,196
Loans Receivable, Net	109,572	112,191
Multifamily Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	0	444
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	0	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	671	2,240
Financing Receivable, Recorded Investment, Past Due	671	2,684
Financing Receivable, Recorded Investment, Current	44,850	44,841
Loans Receivable, Net	45,521	47,525
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	989	3,133
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	778	292
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	2,208	3,891
Financing Receivable, Recorded Investment, Past Due	3,975	7,316
Financing Receivable, Recorded Investment, Current	190,922	190,785
Loans Receivable, Net	194,897	198,101
Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	0	0
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	0	0
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivable, Recorded Investment, Current	5,072	5,070
Loans Receivable, Net	5,072	5,070
Business [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	0	0
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	76	131
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	788	993
Financing Receivable, Recorded Investment, Past Due	864	1,124
Financing Receivable, Recorded Investment, Current	34,617	25,807
Loans Receivable, Net	35,481	26,931
Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	9	2
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	1	2
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	5	1
Financing Receivable, Recorded Investment, Past Due	15	5
Financing Receivable, Recorded Investment, Current	328	133
Loans Receivable, Net	$ 343	$ 138