Summary of Significant Accounting Policies Revenue Concentration (Details)	12 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Revenue Recognition [Abstract]
Concentration Risk on Financing Receivables Percentage	10.00%	10.00%
Concentration Risk on Financing Receivables Description	excess of 10% of the principal balance of commercial loans receivable
Concentration Risk on Factory Built Housing Description	No independent retailer accounted for 10% or more of our factory-built housing revenue