Commercial Loans Receivable (Changes in the Estimated Allowance for Loan Loss) (Details) - Commercial Loans Receivable - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jan. 01, 2022	Dec. 26, 2020	Jan. 01, 2022	Dec. 26, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of period	$ 826	$ 789	$ 816	$ 393
Change in estimated loan losses, net	304	(24)	314	(63)
Balance at end of period	1,130	765	1,130	765
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