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CONTINGENCIES (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 27, 2025
USD ($)
Jun. 03, 2024
USD ($)
Mar. 31, 2025
USD ($)
installment
Mar. 31, 2024
USD ($)
Mar. 31, 2025
USD ($)
installment
Mar. 31, 2024
USD ($)
Jun. 02, 2023
USD ($)
Loss Contingencies [Line Items]              
FNI settlement     $ 7,550 $ 0 $ 7,550 $ 0  
Accrued expenses     $ 0 $ 26,500 $ 0 $ 26,500  
Envigo RMS, LLC (“Envigo RMS”) Class Action Lawsuit [Member]              
Loss Contingencies [Line Items]              
Loss contingency, estimate of possible loss             $ 795
Number of quarterly installments | installment     4   4    
Envigo RMS Holding Corp. and Envigo Global Services, Inc. v. Freese and Nichols, Inc. [Member]              
Loss Contingencies [Line Items]              
Settlement payment period 30 days            
FNI settlement $ 7,550            
US DOJ Resolution and Plea Agreements              
Loss Contingencies [Line Items]              
Loss contingency, estimate of possible loss     $ 22,000   $ 22,000    
Additional debt to be secured by liens   $ 100,000          
US DOJ Resolution and Plea Agreements | Virginia Animal Fighting Taskforce And Humane Society, United States [Member]              
Loss Contingencies [Line Items]              
Payments to be made   3,000          
US DOJ Resolution and Plea Agreements | National Fish and Wildlife Foundation [Member]              
Loss Contingencies [Line Items]              
Payments to be made   3,500          
US DOJ Agreement in Principle - Fines              
Loss Contingencies [Line Items]              
Payments to be made   $ 22,000          
Probation period   5 years          
Monitorship termination, period after completion of selection process   3 years          
Monitorship termination, period after completion of probation   2 months          
US DOJ Agreement in Principle - Fines | June 3, 2027              
Loss Contingencies [Line Items]              
Payments to be made   $ 5,000          
US DOJ Agreement in Principle - Fines | June 3, 2026              
Loss Contingencies [Line Items]              
Payments to be made   5,000          
US DOJ Agreement in Principle - Fines | June 3, 2025              
Loss Contingencies [Line Items]              
Payments to be made   5,000          
US DOJ Agreement in Principle - Fines | June 3, 2028              
Loss Contingencies [Line Items]              
Payments to be made   7,000          
US DOJ Agreement in Principle, Facility Improvements [Member]              
Loss Contingencies [Line Items]              
Payments to be made   7,000          
US DOJ Agreement in Principle, Facility Improvements [Member] | June 3, 2027              
Loss Contingencies [Line Items]              
Payments to be made   2,000          
US DOJ Agreement in Principle, Facility Improvements [Member] | June 3, 2026              
Loss Contingencies [Line Items]              
Payments to be made   2,500          
US DOJ Agreement in Principle, Facility Improvements [Member] | June 3, 2025              
Loss Contingencies [Line Items]              
Payments to be made   $ 2,500