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Loans receivable, net of allowance for loan losses (Details) - USD ($) $ in Thousands		Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount		$ 481,463	$ 389,814
Percentage of Loan Type		100.00%	100.00%
Receivable with Imputed Interest, Premium		$ 2,233	$ 957
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums		(503)	(815)
Allowance for loan losses		(4,477)	(7,233)	$ (10,989)	$ (19,821)
Loans and Leases Receivable, Net Reported Amount		478,716	382,723
Loans held-for-sale (HFS)		2,576	5,011
One- to four family loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount		$ 125,020	$ 111,220
Percentage of Loan Type		26.00%	29.00%
Allowance for loan losses		$ (1,989)	$ (3,377)	(3,496)
Multifamily Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount		$ 93,780	$ 47,399
Percentage of Loan Type		19.00%	12.00%
Allowance for loan losses		$ (534)	$ (308)	(408)
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount		$ 186,443	$ 198,808
Percentage of Loan Type		39.00%	51.00%
Allowance for loan losses		$ (1,029)	$ (1,835)	(3,298)
Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount		$ 5,107	$ 5,100
Percentage of Loan Type		1.00%	1.00%
Allowance for loan losses		$ (99)	$ 0	0
Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount		$ 70,679	$ 27,149
Percentage of Loan Type		15.00%	7.00%
Allowance for loan losses		$ (813)	$ (1,705)	(3,759)
Consumer Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	[1]	$ 434	$ 138
Percentage of Loan Type	[1]	0.00%	0.00%
Allowance for loan losses		$ (13)	$ (8)	$ (28)
[1] (1) Includes personal loans

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Percentage of Loan Type

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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Disclosure of the unamortized amount of the premium on the note or receivable which is added to the face amount of the receivable or loan. The discount or premium is defined as the difference between the present value and the face amount.

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Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements.

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