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Investment Securities Investment Securities (Tables) | 9 Months Ended
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Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract] |
Unrealized Gain (Loss) on Investments | The following tables set forth the amortized cost and estimated fair value of securities available-for-sale and held-to-maturity at December 31, 2017 and March 31, 2017:
|  | At December 31, 2017
|  | Amortized |  | Gross Unrealized |  | Estimated
$ in thousands |  | Cost |  | Gains |  | Losses |  | Fair-Value
Available-for-Sale: |  |  |  |  |  |  |  |
Mortgage-backed securities: |  |  |  |  |  |  |  |
Government National Mortgage Association |  | $ | 2,218 |  |  | $ | — |  |  | $ | 69 |  |  | $ | 2,149 |
Federal Home Loan Mortgage Corporation |  | 6,903 |  |  | — |  |  | 167 |  |  | 6,736 |
Federal National Mortgage Association |  | 25,275 |  |  | — |  |  | 785 |  |  | 24,490 |
Other |  | 45 |  |  | — |  |  | — |  |  | 45 |
Total mortgage-backed securities |  | 34,441 |  |  | — |  |  | 1,021 |  |  | 33,420 |
U.S. Government Agency Securities |  | 6,952 |  |  | — |  |  | 124 |  |  | 6,828 |
Corporate Bonds |  | 5,085 |  |  | — |  |  | 96 |  |  | 4,989 |
Other investments (1) |  | 10,346 |  |  | — |  |  | 496 |  |  | 9,850 |
Total available-for-sale |  | $ | 56,824 |  |  | $ | — |  |  | $ | 1,737 |  |  | $ | 55,087 |
Held-to-Maturity*: |  |  |  |  |  |  |  |
Mortgage-backed securities: |  |  |  |  |  |  |  |
Government National Mortgage Association |  | $ | 1,517 |  |  | $ | 59 |  |  | $ | — |  |  | $ | 1,576 |
Federal National Mortgage Association and Other |  | 9,877 |  |  | — |  |  | 72 |  |  | 9,805 |
Total held-to-maturity mortgage-backed securities |  | 11,394 |  |  | 59 |  |  | 72 |  |  | 11,381 |
Corporate Bonds |  | 1,000 |  |  | 35 |  |  | — |  |  | 1,035 |
Total held-to maturity |  | $ | 12,394 |  |  | $ | 94 |  |  | $ | 72 |  |  | $ | 12,416 |
|  | At March 31, 2017
|  | Amortized |  | Gross Unrealized |  | Estimated
$ in thousands |  | Cost |  | Gains |  | Losses |  | Fair Value
Available-for-Sale: |  |  |  |  |  |  |  |
Mortgage-backed securities: |  |  |  |  |  |  |  |
Government National Mortgage Association |  | $ | 2,576 |  |  | $ | — |  |  | $ | 89 |  |  | $ | 2,487 |
Federal Home Loan Mortgage Corporation |  | 8,053 |  |  | — |  |  | 195 |  |  | 7,858 |
Federal National Mortgage Association |  | 27,241 |  |  | — |  |  | 928 |  |  | 26,313 |
Other |  | 45 |  |  | — |  |  | — |  |  | 45 |
Total mortgage-backed securities |  | 37,915 |  |  | — |  |  | 1,212 |  |  | 36,703 |
U.S. Government Agency Securities |  | 7,574 |  |  | — |  |  | 92 |  |  | 7,482 |
Corporate Bonds |  | 5,104 |  |  | — |  |  | 140 |  |  | 4,964 |
Other investments (1) |  | 10,358 |  |  | — |  |  | 496 |  |  | 9,862 |
Total available-for-sale |  | $ | 60,951 |  |  | $ | — |  |  | $ | 1,940 |  |  | $ | 59,011 |
Held-to-Maturity*: |  |  |  |  |  |  |  |
Mortgage-backed securities: |  |  |  |  |  |  |  |
Government National Mortgage Association |  | $ | 1,797 |  |  | $ | 86 |  |  | $ | — |  |  | $ | 1,883 |
Federal National Mortgage Association and Other |  | 10,638 |  |  | 12 |  |  | 60 |  |  | 10,590 |
Total held-to-maturity mortgage-backed securities |  | 12,435 |  |  | 98 |  |  | 60 |  |  | 12,473 |
Corporate Bonds |  | 1,000 |  |  | 24 |  |  | — |  |  | 1,024 |
Total held-to-maturity |  | $ | 13,435 |  |  | $ | 122 |  |  | $ | 60 |  |  | $ | 13,497 |
* The carrying amount and amortized cost are the same for all held-to-maturity securities, as no OTTI has been recorded. (1) Primarily comprised of an investment in a CRA fund with 95% of its underlying investments consisting of government and agency-backed securities.
Schedule of Realized Gain (Loss) | The following is a summary regarding proceeds, gross gains and gross losses realized from the sale of securities from the available-for-sale portfolio for the three and nine months ended December 31, 2017 and 2016:
|  | For the Three Months Ended December 31, |  | For the Nine Months Ended December 31,
$ in thousands |  | 2017 |  | 2016 |  | 2017 |  | 2016
Proceeds |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 7,259 |
Gross Gains |  | — |  |  | — |  |  | — |  |  | 58 |
Gross Losses |  | — |  |  | — |  |  | — |  |  | — |
Schedule of Unrealized Loss on Investments | The following table sets forth the unrealized losses and fair value of securities in an unrealized loss position at December 31, 2017 and March 31, 2017 for less than 12 months and 12 months or longer:
|  | At December 31, 2017
|  | Less than 12 months |  | 12 months or longer |  | Total
$ in thousands |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value
Available-for-Sale: |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities |  | $ | 29 |  |  | $ | 3,819 |  |  | $ | 992 |  |  | $ | 29,556 |  |  | $ | 1,021 |  |  | $ | 33,375 |
U.S. Government Agency Securities |  | — |  |  | — |  |  | 124 |  |  | 6,828 |  |  | 124 |  |  | 6,828 |
Corporate Bonds |  | — |  |  | — |  |  | 96 |  |  | 4,989 |  |  | 96 |  |  | 4,989 |
Other investments (1) |  | — |  |  | — |  |  | 496 |  |  | 9,504 |  |  | 496 |  |  | 9,504 |
Total available-for-sale securities |  | $ | 29 |  |  | $ | 3,819 |  |  | $ | 1,708 |  |  | $ | 50,877 |  |  | $ | 1,737 |  |  | $ | 54,696 |
Held-to-Maturity: |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities |  | $ | 35 |  |  | $ | 7,968 |  |  | $ | 37 |  |  | $ | 1,728 |  |  | $ | 72 |  |  | $ | 9,696 |
Total held-to-maturity securities |  | $ | 35 |  |  | $ | 7,968 |  |  | $ | 37 |  |  | $ | 1,728 |  |  | $ | 72 |  |  | $ | 9,696 |
|  | At March 31, 2017
|  | Less than 12 months |  | 12 months or longer |  | Total
$ in thousands |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value
Available-for-Sale: |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities |  | $ | 1,171 |  |  | $ | 34,716 |  |  | $ | 41 |  |  | $ | 1,942 |  |  | $ | 1,212 |  |  | $ | 36,658 |
U.S. Government Agency Securities |  | 92 |  |  | 7,482 |  |  | — |  |  | — |  |  | 92 |  |  | 7,482 |
Corporate bonds |  | 140 |  |  | 4,964 |  |  | — |  |  | — |  |  | 140 |  |  | 4,964 |
Other investments (1) |  | — |  |  | — |  |  | 496 |  |  | 9,504 |  |  | 496 |  |  | 9,504 |
Total available-for-sale securities |  | $ | 1,403 |  |  | $ | 47,162 |  |  | $ | 537 |  |  | $ | 11,446 |  |  | $ | 1,940 |  |  | $ | 58,608 |
Held-to-Maturity: |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities |  | $ | 60 |  |  | $ | 7,623 |  |  | $ | — |  |  | $ | — |  |  | $ | 60 |  |  | $ | 7,623 |
Total held-to-maturity securities |  | $ | 60 |  |  | $ | 7,623 |  |  | $ | — |  |  | $ | — |  |  | $ | 60 |  |  | $ | 7,623 |
(1) Primarily comprised of an investment in a CRA fund with 95% of its underlying investments consisting of government and agency-backed securities.
Investments Classified by Contractual Maturity Date | The following is a summary of the carrying value (amortized cost) and fair value of securities at December 31, 2017, by remaining period to contractual maturity (ignoring earlier call dates, if any). Actual maturities may differ from contractual maturities because certain security issuers have the right to call or prepay their obligations. The table below does not consider the effects of possible prepayments or unscheduled repayments.
$ in thousands | Amortized Cost |  | Fair Value |  | Weighted Average Yield
Available-for-Sale: |  |  |  |  |
One through five years | $ | 7,387 |  |  | $ | 7,212 |  |  | 1.66 | %
Five through ten years | 12,142 |  |  | 11,859 |  |  | 2.04 | %
After ten years | 37,295 |  |  | 36,016 |  |  | 1.47 | %
Total | $ | 56,824 |  |  | $ | 55,087 |  |  | 1.62 | %
Held-to-maturity: |  |  |  |  |
Five through ten years | $ | 9,075 |  |  | $ | 9,099 |  |  | 2.81 | %
After ten years | 3,319 |  |  | 3,317 |  |  | 2.64 | %
Total | $ | 12,394 |  |  | $ | 12,416 |  |  | 2.77 | %

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