XML 67 R55.htm IDEA: XBRL DOCUMENT v3.24.1.u1
DEBT - Narrative (Details) - USD ($)
Mar. 15, 2023
May 26, 2021
Mar. 29, 2024
Sep. 30, 2023
Senior Secured Term Loan Facility due May 26, 2028 | Secured Debt | Secured Overnight Financing Rate (SOFR)        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate 2.00%      
Senior Secured Term Loan Facility due May 26, 2028 | Secured Debt | Secured Overnight Financing Rate (SOFR) | One-month interest period        
Debt Instrument [Line Items]        
Credit spread adjustment 0.11448%      
Senior Secured Term Loan Facility due May 26, 2028 | Secured Debt | Secured Overnight Financing Rate (SOFR) | Three-month interest period        
Debt Instrument [Line Items]        
Credit spread adjustment 0.26161%      
Senior Secured Term Loan Facility due May 26, 2028 | Secured Debt | Secured Overnight Financing Rate (SOFR) | Six-month interest period        
Debt Instrument [Line Items]        
Credit spread adjustment 0.42826%      
Senior Notes due June 2031 | Senior Notes        
Debt Instrument [Line Items]        
Debt face amount   $ 400,000,000.0    
Debt instrument, interest rate, stated percentage   4.25%    
Line of credit | ABL Credit Facility | Atkore International        
Debt Instrument [Line Items]        
Credit facility, aggregate commitments     $ 325,000,000  
Credit facility available borrowing capacity     $ 322,406,000 $ 322,406,000
Line of credit | Amended ABL Credit Facility | Secured Overnight Financing Rate (SOFR)        
Debt Instrument [Line Items]        
Credit spread adjustment   0.10%    
Line of credit | Amended ABL Credit Facility | Minimum | Secured Overnight Financing Rate (SOFR)        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate   1.25%    
Line of credit | Amended ABL Credit Facility | Maximum | Secured Overnight Financing Rate (SOFR)        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate   1.75%    
Line of credit | Amended ABL Credit Facility | Secured Debt        
Debt Instrument [Line Items]        
Debt instrument, extended term, period from amendment date   5 years    
Debt instrument, extended term, period prior to maturity date   91 days    
Line of credit facility, term, outstanding obligations threshold amount   $ 100,000,000