Business Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 29, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 29, 2018 USD ($) Segment	Sep. 30, 2017 USD ($)
Business Segment Information
Number of operating segments | Segment			2
Net revenue	$ 241,530	$ 200,507	$ 487,933	$ 407,323
Income before income taxes	19,517	8,499	43,653	24,150
Factory-built housing
Business Segment Information
Net revenue	227,094	187,380	459,856	380,262
Income before income taxes	16,880	8,584	38,488	21,754
Financial services
Business Segment Information
Net revenue	14,436	13,127	28,077	27,061
Income before income taxes	$ 2,637	$ (85)	$ 5,165	$ 2,396