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Debt - Narrative (Details) - USD ($) $ in Thousands |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Nov. 01, 2021 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 22, 2021 | Mar. 15, 2021
Line of Credit Facility [Line Items] |  |  |  |  |  |
Weighted average interest rate on debt |  | 10.44% |  |  |  |
Debt issuance costs |  |  |  |  |  | $ 2,300
Proceeds from long-term debt |  | $ 0 | $ 350,000 | $ 617 |  |
Payment for Debt Extinguishment or Debt Prepayment Cost |  | $ 18,900 | $ 100,000 |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  | 0.20% |  |  |  |
Prior Credit Facility |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Debt issuance costs | $ 400 |  |  |  |  |
Amortization of Debt Issuance Costs | 1,900 |  |  |  |  |
November 1 2021 Credit Agreement |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Debt issuance costs | 11,700 |  |  |  |  |
December 22 2021 Credit Agreement |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Debt issuance costs |  |  |  |  | $ 1,700 |
Secured Debt [Member] |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Maximum borrowing capacity | 350,000 |  |  |  |  |
Secured Debt [Member] | Base Rate |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  | 4.00% |  |  |  |
Secured Debt [Member] | Base Rate | Federal Funds Rate |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  | 0.50% |  |  |  |
Secured Debt [Member] | Base Rate | LIBOR |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  | 1.00% |  |  |  |
Secured Debt [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  | 5.00% |  |  |  |
Secured Debt [Member] | Minimum | Base Rate |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Debt Instrument, Interest Rate, Basis for Effective Rate |  | 0.50 |  |  |  |
Revolving Credit Facility |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Maximum borrowing capacity | 35,000 |  |  |  |  | $ 200,000
Revolving Credit Facility | Minimum | Base Rate |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  | 2.75% |  |  |  |
Revolving Credit Facility | Minimum | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  | 3.75% |  |  |  |
Revolving Credit Facility | Maximum | Base Rate |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  | 3.00% |  |  |  |
Revolving Credit Facility | Maximum | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  | 4.00% |  |  |  |
Letter of Credit |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Maximum borrowing capacity | 10,000 |  |  |  |  |
Swingline Subfacility |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Maximum borrowing capacity | $ 10,000 |  |  |  |  |

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