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Credit Facilities - Narrative (Details)
3 Months Ended 6 Months Ended
Mar. 31, 2024
USD ($)
Mar. 31, 2024
USD ($)
Sep. 30, 2023
USD ($)
Line of Credit Facility [Line Items]      
Debt amortization fiscal year 2024 $ 14,022,000 $ 14,022,000  
Debt amortization fiscal year 2025 19,000,000 19,000,000  
Term loan amortization 14,250,000 14,250,000  
Debt amortization fiscal year 2027 23,750,000 23,750,000  
Long-term debt 170,772,000 170,772,000  
Interest Rate Swap      
Line of Credit Facility [Line Items]      
Decrease in interest expense 300,000 700,000  
Interest Rate Swap Due 2024      
Line of Credit Facility [Line Items]      
Derivative notional amount $ 9,000,000 $ 9,000,000  
Derivative fixed interest rate 1.61% 1.61%  
Interest Rate Swap Due 2026      
Line of Credit Facility [Line Items]      
Derivative notional amount $ 80,000,000 $ 80,000,000  
Derivative fixed interest rate 4.10% 4.10%  
Revolving Line of Credit      
Line of Credit Facility [Line Items]      
Long-term debt $ 14,022,000 $ 14,022,000 $ 9,546,000
Secured Debt      
Line of Credit Facility [Line Items]      
Term loan amortization 4,800,000 4,800,000  
Long-term debt 156,750,000 $ 156,750,000 169,813,000
Secured Debt | Term Loans      
Line of Credit Facility [Line Items]      
Fixed charge coverage ratio   1.25  
Debt amortization fiscal year 2024 14,300,000 $ 14,300,000  
Debt amortization fiscal year 2025 19,000,000 19,000,000  
Term loan amortization 19,000,000 19,000,000  
Debt amortization fiscal year 2027 23,750,000 23,750,000  
Voluntary principal amortization of term debt   5,900,000  
Long-term debt 156,750,000 $ 156,750,000 169,813,000
Secured Debt | Term Loans | Excess Cash Flows Greater Than Or Equal to 2.50      
Line of Credit Facility [Line Items]      
Percentage of excess cash flow for each year of funded indebtedness to EBDTA   75.00%  
Ratio of funded indebtedness to adjusted EBIDTA   2.5  
Secured Debt | Term Loans | Excess Cash Flows Less Than 2.50      
Line of Credit Facility [Line Items]      
Ratio of funded indebtedness to adjusted EBIDTA   2.5  
Secured Debt | Term Loans | Excess Cash Flows Equal to 1.50      
Line of Credit Facility [Line Items]      
Ratio of funded indebtedness to adjusted EBIDTA   1.5  
Secured Debt | Term Loans | Excess Cash Flows Less Than 1.50      
Line of Credit Facility [Line Items]      
Percentage of excess cash flow for each year of funded indebtedness to EBDTA   0.00%  
Ratio of funded indebtedness to adjusted EBIDTA   1.5  
Secured Debt | Term Loans | Excess Cash Flows Less Than 2.50 But Greater Than 1.50      
Line of Credit Facility [Line Items]      
Percentage of excess cash flow for each year of funded indebtedness to EBDTA   50.00%  
Secured Debt | Term Loans | Maximum      
Line of Credit Facility [Line Items]      
Ratio of funded indebtedness to EBITDA through maturity   4.50  
Secured Debt | Term Loans | Minimum      
Line of Credit Facility [Line Items]      
Ratio of funded indebtedness to EBITDA through maturity   2.00  
Secured Debt | Revolving Line of Credit      
Line of Credit Facility [Line Items]      
Long-term debt 14,022,000 $ 14,022,000 $ 9,546,000
Line of credit, maximum borrowing capacity 70,000,000 70,000,000  
Line of credit, unused borrowing capacity 22,500,000 22,500,000  
Secured Debt | Letter of Credit      
Line of Credit Facility [Line Items]      
Line of credit, current borrowing capacity $ 10,000,000 $ 10,000,000