v3.26.1
Long-Term Obligations - Narrative (Details) - USD ($)
$ in Thousands
6 Months Ended
Jul. 04, 2026
Jan. 03, 2026
Sep. 26, 2025
Revolving Credit Facility, due 2030      
Debt Instrument [Line Items]      
Long-term debt $ 502,452 $ 366,707  
Weighted average interest rate for revolving credit facility (as a percentage) 4.19% 4.49%  
Credit Agreement      
Debt Instrument [Line Items]      
Borrowing capacity available under committed portion     $ 750,000
Credit Agreement | Revolving Credit Facility, due 2030      
Debt Instrument [Line Items]      
Additional borrowing capacity under uncommitted portion $ 200,000    
Long-term debt 502,452    
Remaining borrowing capacity 248,668    
Euro-Denominated Borrowing | Revolving Credit Facility, due 2030      
Debt Instrument [Line Items]      
Long-term debt 245,452    
Euro-Denominated Borrowing | Revolving Credit Facility, due 2030 | Revolving Credit Facility | Kadant Profil      
Debt Instrument [Line Items]      
Proceeds from lines of credit $ 181,815