Commercial Loans Receivables (Commercial Loans Receivables by Credit Quality Indicator and Year of Origination) (Details) - USD ($) $ in Thousands	Sep. 26, 2020	Mar. 28, 2020
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	$ 42,511	$ 47,202
Fiscal 2021
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	18,860
Fiscal 2020
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	14,076
Fiscal 2019
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	5,767
Fiscal 2018
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	2,238
Fiscal 2017
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	1,570
Performing
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	42,443	47,016
Performing | Fiscal 2021
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	18,860
Performing | Fiscal 2020
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	14,076
Performing | Fiscal 2019
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	5,699
Performing | Fiscal 2018
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	2,238
Performing | Fiscal 2017
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	1,570
Watch list
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	68	186
Watch list | Fiscal 2021
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	0
Watch list | Fiscal 2020
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	0
Watch list | Fiscal 2019
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	68
Watch list | Fiscal 2018
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	0
Watch list | Fiscal 2017
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	0
Nonperforming
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	0	$ 0
Nonperforming | Fiscal 2021
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	0
Nonperforming | Fiscal 2020
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	0
Nonperforming | Fiscal 2019
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	0
Nonperforming | Fiscal 2018
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	0
Nonperforming | Fiscal 2017
Financing Receivable Recorded Investment [Line Items]
Commercial loans receivable	$ 0