Business Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 30, 2017 USD ($) Segment	Dec. 31, 2016 USD ($)
Business Segment Information
Number of operating segments | Segment			2
Net revenue	$ 221,383	$ 202,310	$ 628,706	$ 575,799
Income before income taxes	23,669	17,279	47,819	38,807
Factory-built housing [Member]
Business Segment Information
Net revenue	207,183	188,546	587,445	536,513
Income before income taxes	18,393	12,370	40,147	33,437
Financial services [Member]
Business Segment Information
Net revenue	14,200	13,764	41,261	39,286
Income before income taxes	$ 5,276	$ 4,909	$ 7,672	$ 5,370