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