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Investments (Unrealized Losses and Fair Value by Length of Time) (Details) - USD ($) $ in Thousands | Jun. 29, 2019 | Mar. 30, 2019
--- | --- | ---
Debt Securities in a Continuous Unrealized Loss Position |  |
Less than 12 Months, Fair Value | $ 903 | $ 1,662
Less than 12 month, Unrealized Losses | (5) | (17)
12 Months or Longer, Fair Value | 5,279 | 8,895
12 Months or Longer, Unrealized Losses | (70) | (141)
Debt Securities, Available-for-sale, Unrealized Loss Position | 6,182 | 10,557
Gross Unrealized Losses | (75) | (158)
U.S. Treasury and government debt securities |  |
Debt Securities in a Continuous Unrealized Loss Position |  |
Less than 12 Months, Fair Value |  | 0
Less than 12 month, Unrealized Losses |  | 0
12 Months or Longer, Fair Value |  | 297
12 Months or Longer, Unrealized Losses |  | (3)
Debt Securities, Available-for-sale, Unrealized Loss Position |  | 297
Gross Unrealized Losses |  | (3)
Residential mortgage-backed securities |  |
Debt Securities in a Continuous Unrealized Loss Position |  |
Less than 12 Months, Fair Value | 656 | 1,066
Less than 12 month, Unrealized Losses | (1) | (9)
12 Months or Longer, Fair Value | 4,022 | 5,206
12 Months or Longer, Unrealized Losses | (59) | (110)
Debt Securities, Available-for-sale, Unrealized Loss Position | 4,678 | 6,272
Gross Unrealized Losses | (60) | (119)
State and political subdivision debt securities |  |
Debt Securities in a Continuous Unrealized Loss Position |  |
Less than 12 Months, Fair Value | 0 | 353
Less than 12 month, Unrealized Losses | 0 | 0
12 Months or Longer, Fair Value | 405 | 2,319
12 Months or Longer, Unrealized Losses | (4) | (17)
Debt Securities, Available-for-sale, Unrealized Loss Position | 405 | 2,672
Gross Unrealized Losses | (4) | (17)
Corporate Debt Securities |  |
Debt Securities in a Continuous Unrealized Loss Position |  |
Less than 12 Months, Fair Value | 247 | 243
Less than 12 month, Unrealized Losses | (4) | (8)
12 Months or Longer, Fair Value | 852 | 1,073
12 Months or Longer, Unrealized Losses | (7) | (11)
Debt Securities, Available-for-sale, Unrealized Loss Position | 1,099 | 1,316
Gross Unrealized Losses | $ (11) | $ (19)

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