Goodwill and Intangible Assets (Composition of other intangible assets) (Details) - USD ($) $ in Thousands	Mar. 28, 2020	Mar. 30, 2019
Composition of other intangible assets
Gross carrying amount	$ 71,573	$ 99,087
Accumulated amortization	41,792	47,980
Customer Lists [Member]
Composition of other intangible assets
Gross carrying amount	42,511	39,710
Accumulated amortization	26,333	23,258
Favorable Leases [Member]
Composition of other intangible assets
Gross carrying amount		30,315
Accumulated amortization		11,049
Trade Names [Member]
Composition of other intangible assets
Gross carrying amount	21,252	21,252
Accumulated amortization	12,072	10,851
Franchise Agreements [Member]
Composition of other intangible assets
Gross carrying amount	7,220	7,220
Accumulated amortization	2,805	2,259
Other Intangible Assets [Member]
Composition of other intangible assets
Gross carrying amount	590	590
Accumulated amortization	$ 582	$ 563