Goodwill and Intangible Assets (Composition of other intangible assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Composition of other intangible assets
Gross carrying amount	$ 61,602	$ 71,573
Accumulated amortization	35,534	41,792
Customer Lists [Member]
Composition of other intangible assets
Gross carrying amount	36,000	42,511
Accumulated amortization	$ 21,932	26,333
Estimated weighted average useful lives, in years	10 years
Trade Names [Member]
Composition of other intangible assets
Gross carrying amount	$ 18,452	21,252
Accumulated amortization	$ 10,321	12,072
Estimated weighted average useful lives, in years	15 years
Franchise Agreements [Member]
Composition of other intangible assets
Gross carrying amount	$ 7,100	7,220
Accumulated amortization	$ 3,231	2,805
Estimated weighted average useful lives, in years	13 years
Other Intangible Assets [Member]
Composition of other intangible assets
Gross carrying amount	$ 50	590
Accumulated amortization	$ 50	$ 582
Estimated weighted average useful lives, in years	20 years