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Postretirement Benefit Plans (Schedule of Fair Value of Pension Assets) (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Mar. 25, 2017
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets |  | $ 22,143
Insurance contracts |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | $ 40,601 |
Cash |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets |  | 160
Pension funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets |  | 21,983
Quoted Prices in Active Markets for Identical Assets Level 1 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets |  | 160
Quoted Prices in Active Markets for Identical Assets Level 1 | Insurance contracts |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 |
Quoted Prices in Active Markets for Identical Assets Level 1 | Cash |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets |  | 160
Quoted Prices in Active Markets for Identical Assets Level 1 | Pension funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets |  | 0
Significant Other Observable Inputs Level 2 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets |  | 21,983
Significant Other Observable Inputs Level 2 | Insurance contracts |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 40,601 |
Significant Other Observable Inputs Level 2 | Cash |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets |  | 0
Significant Other Observable Inputs Level 2 | Pension funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets |  | 21,983
Significant Unobservable Inputs Level 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets |  | 0
Significant Unobservable Inputs Level 3 | Insurance contracts |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | $ 0 |
Significant Unobservable Inputs Level 3 | Cash |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets |  | 0
Significant Unobservable Inputs Level 3 | Pension funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets |  | $ 0

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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