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Investment Securities Investment Securities-Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Mar. 31, 2017
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Schedule of Held-to-maturity Securities [Line Items] |  |  |  |  |
Held-to-maturity | [1] | $ 13,094 |  | $ 13,435 |
Held-to-maturity, Gross Unrealized Gains | [1] | 162 |  | 122 |
Held-to-maturity, Gross Unrealized Losses | [1] | 35 |  | 60 |
Held-to-maturity, Fair Value | [1] | 13,221 |  | 13,497 |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Available-for-sale, Amortized Cost |  | 59,671 |  | 60,951 |
Available-for-sale, Gross Unrealized Gains |  | 0 |  | 0 |
Available-for-sale, Gross Unrealized Losses |  | 1,564 |  | 1,940 |
Available-for-sale, Fair Value |  | 58,107 |  | 59,011 |
Government National Mortgage Association (GNMA) |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Available-for-sale, Amortized Cost |  | 2,326 |  | 2,576 |
Available-for-sale, Gross Unrealized Gains |  | 0 |  | 0 |
Available-for-sale, Gross Unrealized Losses |  | 42 |  | 89 |
Available-for-sale, Fair Value |  | 2,284 |  | 2,487 |
Federal Home Loan Mortgage Corporation (FHLMC) |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Available-for-sale, Amortized Cost |  | 7,680 |  | 8,053 |
Available-for-sale, Gross Unrealized Gains |  | 0 |  | 0 |
Available-for-sale, Gross Unrealized Losses |  | 159 |  | 195 |
Available-for-sale, Fair Value |  | 7,521 |  | 7,858 |
Federal National Mortgage Association (FNMA) |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Available-for-sale, Amortized Cost |  | 26,594 |  | 27,241 |
Available-for-sale, Gross Unrealized Gains |  | 0 |  | 0 |
Available-for-sale, Gross Unrealized Losses |  | 727 |  | 928 |
Available-for-sale, Fair Value |  | 25,867 |  | 26,313 |
Mortgage Backed Securities, Other |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Available-for-sale, Amortized Cost |  | 45 |  | 45 |
Available-for-sale, Gross Unrealized Gains |  | 0 |  | 0 |
Available-for-sale, Gross Unrealized Losses |  | 0 |  | 0 |
Available-for-sale, Fair Value |  | 45 |  | 45 |
Mortgage-backed securities |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Available-for-sale, Amortized Cost |  | 36,645 |  | 37,915 |
Available-for-sale, Gross Unrealized Gains |  | 0 |  | 0 |
Available-for-sale, Gross Unrealized Losses |  | 928 |  | 1,212 |
Available-for-sale, Fair Value |  | 35,717 |  | 36,703 |
US Government Agency Securities |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Available-for-sale, Amortized Cost |  | 7,571 |  | 7,574 |
Available-for-sale, Gross Unrealized Gains |  | 0 |  | 0 |
Available-for-sale, Gross Unrealized Losses |  | 87 |  | 92 |
Available-for-sale, Fair Value |  | 7,484 |  | 7,482 |
Corporate Bonds |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Available-for-sale, Amortized Cost |  | 5,097 |  | 5,104 |
Available-for-sale, Gross Unrealized Gains |  | 0 |  | 0 |
Available-for-sale, Gross Unrealized Losses |  | 107 |  | 140 |
Available-for-sale, Fair Value |  | 4,990 |  | 4,964 |
Other investments |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Available-for-sale, Amortized Cost |  | 10,358 | [2] | 10,358 | [3]
Available-for-sale, Gross Unrealized Gains |  | 0 | [2] | 0 | [3]
Available-for-sale, Gross Unrealized Losses |  | 442 | [2] | 496 | [3]
Available-for-sale, Fair Value |  | 9,916 | [2] | 9,862 | [3]
Government National Mortgage Association (GNMA) |  |  |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |  |  |
Held-to-maturity | [1] | 1,722 |  | 1,797 |
Held-to-maturity, Gross Unrealized Gains | [1] | 90 |  | 86 |
Held-to-maturity, Gross Unrealized Losses | [1] | 0 |  | 0 |
Held-to-maturity, Fair Value | [1] | 1,812 |  | 1,883 |
Federal National Mortgage Association (FNMA) |  |  |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |  |  |
Held-to-maturity | [1] | 10,372 |  | 10,638 |
Held-to-maturity, Gross Unrealized Gains | [1] | 43 |  | 12 |
Held-to-maturity, Gross Unrealized Losses | [1] | 35 |  | 60 |
Held-to-maturity, Fair Value | [1] | 10,380 |  | 10,590 |
Mortgage-backed securities |  |  |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |  |  |
Held-to-maturity | [1] | 12,094 |  | 12,435 |
Held-to-maturity, Gross Unrealized Gains | [1] | 133 |  | 98 |
Held-to-maturity, Gross Unrealized Losses | [1] | 35 |  | 60 |
Held-to-maturity, Fair Value | [1] | 12,192 |  | 12,473 |
Corporate Bonds |  |  |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |  |  |
Held-to-maturity | [1] | 1,000 |  | 1,000 |
Held-to-maturity, Gross Unrealized Gains | [1] | 29 |  | 24 |
Held-to-maturity, Gross Unrealized Losses | [1] | 0 |  | 0 |
Held-to-maturity, Fair Value | [1] | $ 1,029 |  | $ 1,024 |
[1] | * The carrying amount and amortized cost are the same for all held-to-maturity securities, as no OTTI has been recorded.
[2] | (1) Primarily comprised of an investment in a CRA fund with 95% of its underlying investments consisting of government and agency-backed securities.
[3] | (1) Primarily comprised of an investment in a CRA fund with 95% of its underlying investments consisting of government and agency-backed securities.

X
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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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