Post-effective amendment to a registration statement that is not immediately effective upon filing

Nature of Operations (Details)

v3.22.1
Nature of Operations (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Apr. 02, 2022
USD ($)
segment
Mar. 27, 2021
USD ($)
Mar. 27, 2021
USD ($)
Jan. 01, 2022
USD ($)
segment
Dec. 26, 2020
USD ($)
Dec. 28, 2019
USD ($)
Aug. 31, 2021
Aug. 18, 2021
Aug. 17, 2021
Jan. 18, 2021
Jan. 02, 2020
Schedule of Equity Method Investments [Line Items]                      
Number of reportable segments | segment 2     2              
Assets $ 1,198,708 $ 898,746 $ 898,746 $ 1,122,002 $ 873,480            
Revenue 229,520 $ 152,824   750,150 548,973 $ 565,292          
Non-U.S.                      
Schedule of Equity Method Investments [Line Items]                      
Assets 64,422     58,439 53,424            
Revenue $ 17,914   $ 12,560 $ 68,579 $ 45,490 $ 43,543          
G & M Stor-More Pty Ltd                      
Schedule of Equity Method Investments [Line Items]                      
Interest acquired                   100.00%  
DBCI, LLC                      
Schedule of Equity Method Investments [Line Items]                      
Interest acquired               100.00% 100.00%    
Access Control Technologies, LLC                      
Schedule of Equity Method Investments [Line Items]                      
Interest acquired             100.00%        
Janus International Europe Holdings Ltd. (UK) | Janus International Europe Ltd. (UK)                      
Schedule of Equity Method Investments [Line Items]                      
Ownership percentage 100.00%     100.00%              
Janus International Europe Holdings Ltd. (UK) | Active Supply & Design (CDM) Ltd. (UK)                      
Schedule of Equity Method Investments [Line Items]                      
Ownership percentage 100.00%     100.00%              
Janus International Europe Holdings Ltd. (UK) | Steel Storage Australia & Steel Storage Asia                      
Schedule of Equity Method Investments [Line Items]                      
Ownership percentage 100.00%     100.00%              
Janus International Europe Holdings Ltd. (UK) | Steel Storage Australia & Steel Storage Asia                      
Schedule of Equity Method Investments [Line Items]                      
Interest acquired                     100.00%
Janus Cobb Holdings, LLC | Asta Industries, Inc.                      
Schedule of Equity Method Investments [Line Items]                      
Ownership percentage 100.00%     100.00%              
Janus Cobb Holdings, LLC | Nokē, Inc.                      
Schedule of Equity Method Investments [Line Items]                      
Ownership percentage 100.00%     100.00%