Commercial Loans Receivables and Allowance for Loan Loss (Concentrations of Commercial Loans Receivables) (Details)	Dec. 28, 2019	Mar. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration with one independent third-party and its affiliates	19.80%	22.00%
CALIFORNIA
Geographic Concentration of Commercial Loans Receivables in Key States
Commercial Loans Receivables Geographic Concentration Percentage	20.40%	21.10%
ARIZONA
Geographic Concentration of Commercial Loans Receivables in Key States
Commercial Loans Receivables Geographic Concentration Percentage	17.50%	16.30%
OREGON
Geographic Concentration of Commercial Loans Receivables in Key States
Commercial Loans Receivables Geographic Concentration Percentage		10.40%