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Debt - Narrative (Details) - USD ($) $ in Thousands		4 Months Ended	8 Months Ended	12 Months Ended
	Nov. 01, 2021	Sep. 30, 2024	May 31, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022	Dec. 07, 2023	Dec. 22, 2021	Mar. 15, 2021
Line of Credit Facility [Line Items]
Maximum borrowing capacity								$ 215,000
Weighted average interest rate on debt		7.46%		7.46%
Debt issuance costs							$ 9,700		$ 2,300
Debt instrument, basis spread on variable rate		2.25%	2.50%
Proceeds from long-term debt				$ 214,062	$ 0	$ 350,000
Payment for Debt Extinguishment or Debt Prepayment Cost					$ 18,900	$ 100,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage				0.25%
Repayments of Debt				$ 91,100
Credit Agreement [Domain] | Line of Credit
Line of Credit Facility [Line Items]
Debt Instrument, Covenant, Leverage Ratio, Minimum		3		3
Debt Instrument, Covenant, Liquidity Ratio, Total Net Leverage Ratio		3		3
Debt Instrument, Covenant, Holiday		3.5		3.5
Total Net Leverage Ratio, Unrestricted Cash, Maximum		$ 50,000		$ 50,000
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						1,300
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 | 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] | Minimum | Base Rate
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Basis for Effective Rate				0.00
Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity							250,000	35,000	$ 200,000
Line Of Credit Facility, Accordion Feature, Increase Limit							95,000
Revolving Credit Facility | Minimum
Line of Credit Facility [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage				0.20%
Revolving Credit Facility | Minimum | Base Rate
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				0.75%
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				1.75%
Revolving Credit Facility | Maximum
Line of Credit Facility [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage				0.35%
Revolving Credit Facility | Maximum | Base Rate
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				1.75%
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				2.75%
Letter of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity							$ 10,000	10,000
Swingline Subfacility
Line of Credit Facility [Line Items]
Maximum borrowing capacity								$ 10,000

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Amount of amortization expense attributable to debt issuance costs.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

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