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Summary of Significant Accounting Policies - Additional information (Detail)
 12 Months Ended
Sep. 29, 2016
Facility
Mar. 30, 2019
USD ($)
Facility
Center
shares
Mar. 31, 2018
USD ($)
Apr. 01, 2017
USD ($)
Facility
Center
Jan. 05, 2018
shares
Significant Accounting Policies [Line Items]          
Common stock, shares issued | shares   56,657,000      
Impairment of development inventory     $ 1,200,000    
Development inventory, net   $ 0 0 $ 1,200,000  
Allowance for doubtful accounts   600,000 200,000    
Depreciation expense, including amortization of assets under capital lease   $ 11,300,000 7,800,000 6,800,000  
Number of idle manufacturing facilities | Facility   5      
Number of idle retail sales centers | Center   2      
Net book value of property, plant and equipment   $ 108,587,000 67,960,000    
Proceeds from disposal of property, plant and equipment   56,000 551,000 5,053,000  
Net gain on sale of property, plant and equipment   37,000 $ 122,000 985,000  
Asset held for sale   $ 2,100,000      
Amortization period for useful lives of intangible assets   8 years 5 years 4 months 24 days    
Reclassified net of accumulated other comprehensive income to net income       $ 7,600,000  
Tax effect for comprehensive income   $ 0 $ 0    
Innovative Building Systems LLC [Member]          
Significant Accounting Policies [Line Items]          
Number of manufacturing facilities | Facility 5        
Number of idle manufacturing facilities acquired | Facility       3  
Number of idle retail sales centers acquired | Center       2  
Minimum [Member] | ASC 842 [Member]          
Significant Accounting Policies [Line Items]          
Operating lease, right-of-use asset   12,000,000      
Operating lease, liability   $ 12,000,000      
Maximum [Member]          
Significant Accounting Policies [Line Items]          
Amortization period for useful lives of intangible assets   10 years      
Maximum [Member] | ASC 842 [Member]          
Significant Accounting Policies [Line Items]          
Operating lease, right-of-use asset   $ 15,000,000      
Operating lease, liability   $ 15,000,000      
Land and Improvements [Member] | Minimum [Member]          
Significant Accounting Policies [Line Items]          
Estimated useful lives of property, plant and equipment   3 years      
Land and Improvements [Member] | Maximum [Member]          
Significant Accounting Policies [Line Items]          
Estimated useful lives of property, plant and equipment   10 years      
Building and Improvements [Member] | Minimum [Member]          
Significant Accounting Policies [Line Items]          
Estimated useful lives of property, plant and equipment   8 years      
Building and Improvements [Member] | Maximum [Member]          
Significant Accounting Policies [Line Items]          
Estimated useful lives of property, plant and equipment   25 years      
Machinery and Equipment [Member] | Minimum [Member]          
Significant Accounting Policies [Line Items]          
Estimated useful lives of property, plant and equipment   3 years      
Machinery and Equipment [Member] | Maximum [Member]          
Significant Accounting Policies [Line Items]          
Estimated useful lives of property, plant and equipment   8 years      
Vehicles [Member] | Minimum [Member]          
Significant Accounting Policies [Line Items]          
Estimated useful lives of property, plant and equipment   3 years      
Vehicles [Member] | Maximum [Member]          
Significant Accounting Policies [Line Items]          
Estimated useful lives of property, plant and equipment   8 years      
Idle Manufacturing Facilities and Idle Retail Sales Centers [Member]          
Significant Accounting Policies [Line Items]          
Net book value of property, plant and equipment   $ 9,600,000      
Idle Manufacturing Facilities and Idle Retail Sales Centers [Member] | Innovative Building Systems LLC [Member]          
Significant Accounting Policies [Line Items]          
Net book value of property, plant and equipment       $ 8,600,000  
Idle Manufacturing Facilities [Member]          
Significant Accounting Policies [Line Items]          
Number of manufacturing facilities sold | Facility       4  
Proceeds from disposal of property, plant and equipment       $ 5,000,000  
Net gain on sale of property, plant and equipment       900,000  
Selling, General and Administrative Expenses [Member]          
Significant Accounting Policies [Line Items]          
Total advertising expense   $ 1,500,000 $ 1,000,000 $ 1,000,000  
U.S [Member]          
Significant Accounting Policies [Line Items]          
Number of manufacturing facilities | Facility   31      
Number of sales centers | Center   21      
Canada [Member]          
Significant Accounting Policies [Line Items]          
Number of manufacturing facilities | Facility   5      
Indiana Corporation [Member]          
Significant Accounting Policies [Line Items]          
Ownership percentage         15.50%
Consolidated Joint Venture [Member]          
Significant Accounting Policies [Line Items]          
Equity interest in consolidated joint venture   90.00%      
Champion Enterprises Holdings, LLC [Member]          
Significant Accounting Policies [Line Items]          
Common stock, shares issued | shares         47,752,008
Ownership percentage         84.50%