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Goodwill and Intangible Assets (Composition of other intangible assets) (Details) - USD ($) $ in Thousands | Mar. 30, 2019 | Mar. 31, 2018
--- | --- | ---
Composition of other intangible assets |  |
Gross carrying amount | $ 99,087 | $ 90,150
Accumulated amortization | 47,980 | 41,007
Customer Lists [Member] |  |
Composition of other intangible assets |  |
Gross carrying amount | 39,710 | 33,832
Accumulated amortization | 23,258 | 19,637
Favorable Leases [Member] |  |
Composition of other intangible assets |  |
Gross carrying amount | 30,315 | 27,656
Accumulated amortization | 11,049 | 9,470
Trade Names [Member] |  |
Composition of other intangible assets |  |
Gross carrying amount | 21,252 | 20,852
Accumulated amortization | 10,851 | 9,644
Franchise Agreements [Member] |  |
Composition of other intangible assets |  |
Gross carrying amount | 7,220 | 7,220
Accumulated amortization | 2,259 | 1,713
Other Intangible Assets [Member] |  |
Composition of other intangible assets |  |
Gross carrying amount | 590 | 590
Accumulated amortization | $ 563 | $ 543

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