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Debt (Narrative) (Details)						3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jan. 18, 2024 USD ($)	Jul. 05, 2023 day	Oct. 01, 2020 day	Jun. 18, 2020 USD ($) $ / shares	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Line of Credit Facility [Line Items]
Secured term loan facility						$ 320,280,000		$ 320,280,000		$ 312,045,000
Payments of debt issuance costs								10,044,000	$ 0
Interest expense						8,400,000	$ 6,600,000	24,500,000	19,100,000
Non-cash debt extinguishment expense						0	0	3,669,000	0
Current portion of long-term debt						99,698,000		99,698,000		1,451,000
Long-term debt						313,968,000		313,968,000		306,982,000
For Period from Second Quarter To Fourth Quarter of Fiscal Year 2024 | Secured Debt
Line of Credit Facility [Line Items]
Debt Instrument, net leverage ratio		6.25
From First Quarter of Fiscal Year 2025 and Thereafter | Secured Debt
Line of Credit Facility [Line Items]
Debt Instrument, net leverage ratio		5.75
Secured Debt
Line of Credit Facility [Line Items]
Secured term loan facility						0		0		211,500,000
Credit Facility
Line of Credit Facility [Line Items]
Interest expense						7,100,000		19,800,000
Credit Facility | Non-cash Amortization of Debt Issuance Costs
Line of Credit Facility [Line Items]
Interest expense						358,000		997,000
Convertible Senior Notes
Line of Credit Facility [Line Items]
Face value					$ 100,000,000.0
Secured term loan facility						100,000,000		100,000,000		100,000,000
Interest expense						1,200,000	$ 1,200,000	3,700,000	$ 3,700,000
Unamortized debt issuance costs						$ 582,000		$ 582,000		1,100,000
Interest rate on amounts borrowed		4.25%			4.25%
Effective interest rate						5.05%		5.05%
Proceeds from issuance of convertible debt					$ 96,500,000
Conversion ratio					0.0426203
Conversion price (in dollars per share) | $ / shares					$ 23.46
Debt fair value						$ 125,400,000		$ 125,400,000
Convertible Senior Notes | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06
Line of Credit Facility [Line Items]
Current portion of long-term debt						100,000,000.0		100,000,000.0
Long-term debt										$ 100,000,000.0
Convertible Senior Notes | Circumstance I
Line of Credit Facility [Line Items]
Conversion trading day threshold | day				20
Conversion consecutive trading day threshold | day				30
Conversion percentage of stock price threshold				130.00%
Convertible Senior Notes | Circumstance II
Line of Credit Facility [Line Items]
Conversion trading day threshold | day				5
Conversion consecutive trading day threshold | day				5
Conversion percentage of stock price threshold				98.00%
Convertible Senior Notes | Circumstance After July 5, 2023
Line of Credit Facility [Line Items]
Conversion trading day threshold | day			20
Conversion consecutive trading day threshold | day			30
Conversion percentage of stock price threshold			130.00%
Conversion percentage of principal amount			100.00%
Convertible Senior Notes | Prior to Maturity
Line of Credit Facility [Line Items]
Periodic payment, principal								0
Credit and Guaranty Agreement | Secured Debt
Line of Credit Facility [Line Items]
Face value		$ 350,000,000
Initial Term Loan Facility | Secured Debt
Line of Credit Facility [Line Items]
Face value		190,000,000
Secured term loan facility		190,000,000
Payments of debt issuance costs								6,500,000
Unamortized debt issuance costs						5,700,000		5,700,000
Delayed Draw Term Loan Facility | Secured Debt
Line of Credit Facility [Line Items]
Face value		$ 100,000,000
Debt issuance costs, net						$ 3,700,000		$ 3,700,000
Commitment fee percentage		1.00%
Revolving Credit Facility | Secured Debt
Line of Credit Facility [Line Items]
Effective interest rate						9.28%		9.28%
Revolving Credit Facility | Secured Debt | Base Rate
Line of Credit Facility [Line Items]
Interest rate on amounts borrowed		3.00%
Revolving Credit Facility | Secured Debt | SOFR
Line of Credit Facility [Line Items]
Interest rate on amounts borrowed		4.00%
Revolving Credit Facility | Secured Debt
Line of Credit Facility [Line Items]
Face value		$ 60,000,000
Debt instrument, unused borrowing capacity, amount		30,000,000
Secured term loan facility		$ 30,000,000
Debt issuance costs, net						$ 3,700,000		$ 3,700,000
Commitment fee percentage		0.50%
Revolving Credit Facility | Secured Debt | If Prepayment Occurs Prior To January 18, 2025
Line of Credit Facility [Line Items]
Debt prepayment premium		5.00%
Revolving Credit Facility | Secured Debt | If Prepayment Occurs After January 18, 2025 And Prior To January 18, 2026
Line of Credit Facility [Line Items]
Debt prepayment premium		1.00%
Term Loan Facilities | Secured Debt | Base Rate
Line of Credit Facility [Line Items]
Credit facility margin		5.50%
Term Loan Facilities | Secured Debt | SOFR
Line of Credit Facility [Line Items]
Credit facility margin		6.50%
Term Loan Facilities | Secured Debt
Line of Credit Facility [Line Items]
Non-cash debt extinguishment expense								$ 3,700,000
Effective interest rate						11.78%		11.78%
Term Loan Facilities | Secured Debt | Forecast
Line of Credit Facility [Line Items]
Debt Instrument, net leverage ratio	3.75
Term Loan Facilities | Secured Debt | If Certain Conditions Are Met After Q2, 2025 | Forecast
Line of Credit Facility [Line Items]
Decrease in basis spread on variable rate	25
Term Loan Facilities | Secured Debt | If Certain Conditions Are Met After Q2, 2025 | Base Rate | Forecast
Line of Credit Facility [Line Items]
Credit facility margin	5.25%
Term Loan Facilities | Secured Debt | If Certain Conditions Are Met After Q2, 2025 | SOFR | Forecast
Line of Credit Facility [Line Items]
Credit facility margin	6.25%

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