Goodwill and Intangible Assets (Composition of other intangible assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 26, 2022	Mar. 27, 2021
Composition of other intangible assets
Gross carrying amount	$ 66,422	$ 61,602
Accumulated amortization	39,740	35,534
Customer List [Member]
Composition of other intangible assets
Gross carrying amount	38,090	36,000
Accumulated amortization	$ 24,406	21,932
Estimated weighted average useful lives, in years	10 years
Trade Names [Member]
Composition of other intangible assets
Gross carrying amount	$ 19,482	18,452
Accumulated amortization	$ 11,436	10,321
Estimated weighted average useful lives, in years	15 years
Franchise Agreements [Member]
Composition of other intangible assets
Gross carrying amount	$ 8,800	7,100
Accumulated amortization	$ 3,848	3,231
Estimated weighted average useful lives, in years	12 years
Other Intangible Assets [Member]
Composition of other intangible assets
Gross carrying amount	$ 50	50
Accumulated amortization	$ 50	$ 50
Estimated weighted average useful lives, in years	20 years