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Lakeville Acquisition - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 29, 2023
Mar. 28, 2024
Mar. 30, 2023
Mar. 28, 2024
Mar. 30, 2023
Business Acquisition [Line Items]          
Payments to acquire businesses $ 58,974     $ 58,974 $ 3,500
Business combination amount to be received from seller 2,572        
Business combination, recognized identifiable assets acquired and liabilities assumed, net 61,950        
Business combination, bargain purchase, gain recognized, amount   $ 0 $ 0 2,226 $ 0
Net sales $ 75,606        
Business combination, acquisition related costs   $ 142   $ 81  
TreeHouse Foods, Inc. [Member]          
Business Acquisition [Line Items]          
Date of acquisition Sep. 29, 2023        
Lakeville [Member]          
Business Acquisition [Line Items]          
Payments to acquire businesses $ 58,974        
Business combination, initial purchase price $ 61,546        
Business combination, assets and liabilities arising from contingencies, description There were no recognized or unrecognized material contingencies associated with the acquired business        
Business Acquisition, Description of Acquired Entity The Lakeville Acquisition accelerates our strategy within the growing snack bar category and diversifies our product offerings. It also allows us to offer private brand customers a complete portfolio of snack bars, including fruit and grain, crunchy, protein, sweet and salty and chewy bars that complement internally developed nutrition bars.        
Acquired finite-lived intangible assets, weighted average useful life 5 years 4 months 24 days        
Business Combination, Bargain Purchase, Gain Recognized, Description We believe the Lakeville Acquisition resulted in a bargain purchase gain because the Seller was motivated to divest such snack bars business, as its performance no longer supported the Seller's long-term growth targets.