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Investments Investments (Narrative) (Details) - USD ($) | 12 Months Ended
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Apr. 02, 2016 | Mar. 28, 2015
Schedule of Available-for-sale Securities [Line Items] |  |
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities | $ 0 |
Investments (Textual) [Abstract] |  |
Gross gains realized | 431,000 | $ 871,000
Gross losses realized | (385,000) | (254,000)
Common stock of industrial and other companies [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Fair Value | 7,700,000 | 5,400,000
Total unrealized losses | (409,000) | (85,000)
Common stock of bank trust, insurance, and public utility companies [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Fair Value | 100,000 | 100,000
Total unrealized losses | $ (3,000) | $ (3,000)

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- Definition Amount of equity securities categorized neither as held-to-maturity nor as trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26610-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 + Details
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- Definition This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 + Details
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