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Investment Securities Investment Securities Unrealized losses and fair value of securities (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Mar. 31, 2015
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Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | $ 2 | $ 3
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value |  | 2,998 | 2,996
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | 188 | 375
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value |  | 15,749 | 36,537
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | 190 | 378
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  | 18,747 | 39,533
Mortgage-backed securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | 0 | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value |  | 0 | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | 44 | 136
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value |  | 5,893 | 15,502
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | 44 | 136
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  | 5,893 | 15,502
US Government Agency Securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | 2 | 3
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value |  | 2,998 | 2,996
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | 0 | 32
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value |  | 0 | 11,242
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | 2 | 35
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  | 2,998 | 14,238
Other |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | [1] | 0 | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | [1] | 0 | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | [1] | 144 | 207
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | [1] | 9,856 | 9,793
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | [1] | 144 | 207
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | [1] | $ 9,856 | $ 9,793
[1] | (1) CRA fund comprised of over 95% agency securities.

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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 + Details
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