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