Loan Receivable and Allowance for Loan and Lease Losses Credit Risk Profile Internal Grade (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Mar. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	$ 435,534	$ 389,956
Multifamily Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	64,138	47,525
Multifamily Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	62,648	46,028
Multifamily Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	0	0
Multifamily Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	1,490	1,497
Multifamily Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	0	0
Multifamily Loans [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	0	0
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	200,334	198,101
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	193,905	184,850
Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	2,519	7,129
Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	3,910	6,122
Commercial Real Estate [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	0	0
Commercial Real Estate [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	0	0
Construction Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	5,074	5,070
Construction Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	5,074	5,070
Construction Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	0	0
Construction Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	0	0
Construction Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	0	0
Construction Loans [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	0	0
Business [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	38,244	26,931
Business [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	31,908	20,638
Business [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	889	1,295
Business [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	5,447	4,998
Business [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	0	0
Business [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	0	0
One- to four family loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	127,417	112,191
One- to four family loans [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	123,280	109,890
One- to four family loans [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	4,137	2,301
Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	327	138
Consumer Loan [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	313	137
Consumer Loan [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Net	$ 14	$ 1