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Loan Receivable and Allowance for Loan and Lease Losses Loans receivable, net of allowance for loan losses (Details) - USD ($) $ in Thousands | Jun. 30, 2016 | Mar. 31, 2016 | Jun. 30, 2015 | Mar. 31, 2015
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans and Leases Receivable, Gross, Carrying Amount |  | $ 557,234 | $ 584,294 |  |
Percentage of Loan Type |  | 100.00% | 100.00% |  |
Loans Receivable Held-for-sale, Amount |  | $ 5,829 | $ 2,495 |  |
Deferred fees and loan discounts, net |  | 4,444 | 4,725 |  |
Allowance for loan losses |  | (5,183) | (5,232) | $ (3,975) | $ (4,428)
Total loans receivable, net |  | 556,495 | 583,787 |  |
Residential Portfolio Segment [Member] |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans and Leases Receivable, Gross, Carrying Amount |  | $ 133,353 | $ 141,243 |  |
Percentage of Loan Type |  | 24.00% | 24.00% |  |
Allowance for loan losses |  | $ (1,875) | $ (1,697) | (1,640) | (1,970)
Multifamily [Member] |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans and Leases Receivable, Gross, Carrying Amount |  | $ 81,527 | $ 94,202 |  |
Percentage of Loan Type |  | 15.00% | 16.00% |  |
Allowance for loan losses |  | $ (530) | $ (622) | (410) | (502)
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans and Leases Receivable, Gross, Carrying Amount |  | $ 267,463 | $ 272,497 |  |
Percentage of Loan Type |  | 48.00% | 47.00% |  |
Allowance for loan losses |  | $ (1,858) | $ (1,808) | (1,032) | (1,029)
Construction Loans [Member] |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans and Leases Receivable, Gross, Carrying Amount |  | $ 5,021 | $ 5,033 |  |
Percentage of Loan Type |  | 1.00% | 1.00% |  |
Allowance for loan losses |  | $ (62) | $ (62) | (99) | (99)
Commercial Loan [Member] |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans and Leases Receivable, Gross, Carrying Amount | [1] | $ 69,745 | $ 71,277 |  |
Percentage of Loan Type | [1] | 13.00% | 12.00% |  |
Allowance for loan losses |  | $ (856) | $ (1,022) | (791) | (813)
Consumer Loan [Member] |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans and Leases Receivable, Gross, Carrying Amount | [2] | $ 125 | $ 42 |  |
Percentage of Loan Type | [2] | 0.00% | 0.00% |  |
Allowance for loan losses |  | $ (2) | $ (21) | $ (3) | $ (15)
[1] | (1) Includes business overdrafts
[2] | 2) Includes personal loans and consumer overdrafts

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition The face amount of loans that will be sold to other entities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6378536&loc=d3e10092-111533 + Details
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