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Investments (Gross Unrealized Gains and Losses by Investment Category) (Details) - USD ($) $ in Thousands | Jun. 27, 2020 | Mar. 28, 2020
--- | --- | ---
Available-for-Sale Securities by Investment Category |  |
Amortized Cost | $ 13,776 | $ 14,660
Gross Unrealized Gains | 244 | 208
Gross Unrealized Losses | (45) | (94)
Available-for-sale debt securities | 13,975 | 14,774
Residential mortgage-backed securities |  |
Available-for-Sale Securities by Investment Category |  |
Amortized Cost | 4,637 | 5,400
Gross Unrealized Gains | 65 | 69
Gross Unrealized Losses | (31) | (26)
Available-for-sale debt securities | 4,671 | 5,443
State and political subdivision debt securities |  |
Available-for-Sale Securities by Investment Category |  |
Amortized Cost | 4,426 | 4,239
Gross Unrealized Gains | 155 | 134
Gross Unrealized Losses | 0 | (3)
Available-for-sale debt securities | 4,581 | 4,370
Corporate debt securities |  |
Available-for-Sale Securities by Investment Category |  |
Amortized Cost | 4,713 | 5,021
Gross Unrealized Gains | 24 | 5
Gross Unrealized Losses | (14) | (65)
Available-for-sale debt securities | $ 4,723 | $ 4,961

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
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