Segment Information - Schedule of Financial Information by Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Dec. 29, 2018	Dec. 30, 2017	Dec. 29, 2018	Dec. 30, 2017	Mar. 31, 2018
Segment Reporting Information [Line Items]
Net sales	$ 354,671	$ 294,378	$ 1,032,368	$ 798,443
Operating income (loss)	15,888	23,383	(43,109)	46,180
Depreciation	2,944	1,901	8,219	5,761
Amortization	(1,633)	(127)	(3,316)	(365)
Amortization of intangible assets	1,600	200	3,316	365
Assets	678,264		678,264		$ 395,398
U.S Factory-built Housing [Member]
Segment Reporting Information [Line Items]
Net sales	309,518		882,257
Canadian Factory-built Housing [Member]
Segment Reporting Information [Line Items]
Net sales	27,130		79,885
Operating Segments [Member] \| U.S Factory-built Housing [Member]
Segment Reporting Information [Line Items]
Net sales	309,518	242,739	882,257	641,878
Operating income (loss)	30,637	27,184	80,240	52,988
Depreciation	2,486	1,553	6,946	4,706
Amortization of intangible assets	1,572	65	3,134	182
Capital expenditures	1,463	1,485	4,919	6,505
Assets	465,095	190,323	465,095	190,323
Operating Segments [Member] \| Canadian Factory-built Housing [Member]
Segment Reporting Information [Line Items]
Net sales	27,130	24,950	79,885	74,006
Operating income (loss)	2,568	1,836	9,123	8,475
Depreciation	237	231	695	675
Amortization of intangible assets	61	62	182	183
Capital expenditures	158	354	572	754
Assets	55,224	54,449	55,224	54,449
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Net sales	18,023	26,689	70,226	82,559
Operating income (loss)	(12,740)	(3,609)	(120,937)	(9,157)
Depreciation	221	117	578	380
Capital expenditures	1,322	175	2,136	608
Assets	157,945	150,626	157,945	150,626
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Net sales	354,671	294,378	1,032,368	798,443
Operating income (loss)	15,888	23,383	(43,109)	46,180
Depreciation	2,944	1,901	8,219	5,761
Amortization of intangible assets	1,633	127	3,316	365
Capital expenditures	2,943	2,014	7,627	7,867
Assets	$ 678,264	$ 395,398	$ 678,264	$ 395,398

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