Commercial Loans Receivable (Changes in the Estimated Allowance for Loan Loss) (Details) - Commercial Loans Receivable - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of period	$ 785	$ 828	$ 816	$ 393
Change in estimated loan losses, net	41	(39)	10	(39)
Balance at end of period	826	789	826	789
Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Line Items]
Impact of adoption of ASU 2016-13	$ 0	$ 0	$ 0	$ 435

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant