Reinsurance (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Reinsurance Effect on Premiums Written and Earned
Direct premiums Written	$ 4,915	$ 4,179	$ 10,680	$ 9,212
Assumed premiums - nonaffiliate Written	7,593	6,760	15,246	14,273
Ceded premiums - nonaffiliate Written	(2,853)	(3,029)	(6,055)	(6,016)
Net premiums Written	9,655	7,910	19,871	17,469
Direct premiums Earned	5,145	4,653	10,330	9,223
Assumed premiums - nonaffiliate Earned	7,043	6,592	13,833	13,027
Ceded premiums - nonaffiliate Earned	(2,853)	(3,029)	(6,055)	(6,016)
Premiums Earned, Net	$ 9,335	$ 8,216	$ 18,108	$ 16,234