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Investments Investments (Continuous Unrealized Loss Positions) (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Apr. 01, 2017
--- | --- | ---
Investment Securities in a Continuous Unrealized Loss Position |  |
Less than 12 Months, Fair Value | $ 9,636 | $ 8,563
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (379) | (188)
12 Months or Longer, Fair Value | 6,471 | 4,203
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (235) | (173)
Total Fair Value | 16,107 | 12,766
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 614 | 361
U.S. Treasury and Government Agencies [Member] |  |
Investment Securities in a Continuous Unrealized Loss Position |  |
Less than 12 Months, Fair Value | 293 | 349
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (7) | (1)
12 Months or Longer, Fair Value | 0 | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | 0
Total Fair Value | 293 | 349
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 7 | 1
Mortgage-backed securities [Member] |  |
Investment Securities in a Continuous Unrealized Loss Position |  |
Less than 12 Months, Fair Value | 3,185 | 3,449
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (52) | (38)
12 Months or Longer, Fair Value | 3,909 | 1,962
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (103) | (52)
Total Fair Value | 7,094 | 5,411
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 155 | 90
States and political subdivisions [Member] |  |
Investment Securities in a Continuous Unrealized Loss Position |  |
Less than 12 Months, Fair Value | 2,224 | 1,948
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (40) | (36)
12 Months or Longer, Fair Value | 2,180 | 2,084
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (109) | (81)
Total Fair Value | 4,404 | 4,032
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 149 | 117
Corporate Debt Securities [Member] |  |
Investment Securities in a Continuous Unrealized Loss Position |  |
Less than 12 Months, Fair Value | 1,384 | 1,424
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (12) | (23)
12 Months or Longer, Fair Value | 367 | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (18) | 0
Total Fair Value | 1,751 | 1,424
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 30 | 23
Equity Securities [Member] |  |
Investment Securities in a Continuous Unrealized Loss Position |  |
Less than 12 Months, Fair Value | 2,550 | 1,393
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (268) | (90)
12 Months or Longer, Fair Value | 15 | 157
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (5) | (40)
Total Fair Value | 2,565 | 1,550
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | $ 273 | $ 130

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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=82897076&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=82897076&loc=d3e27337-111563 + Details
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