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Debt (Additional Information) (Details) - USD ($) $ in Thousands														1 Months Ended	3 Months Ended
	Oct. 29, 2025	Aug. 06, 2025	Jan. 17, 2025	Aug. 21, 2024	Jan. 26, 2024	Jan. 25, 2024	Nov. 22, 2022	Sep. 22, 2022	Apr. 11, 2022	Mar. 11, 2022	Aug. 12, 2021	Mar. 31, 2021	Mar. 01, 2021	Jun. 30, 2022	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2022	Jun. 30, 2025
Line of Credit Facility [Line Items]
Repayment of long-term debt																$ 9,873
Long-term debt, gross															$ 558,283			$ 558,283
Debt Issuance Costs Write-off															295
Capitalized debt issuance costs															3,770
Surety Bond
Line of Credit Facility [Line Items]
Guarantor Obligations, Current Carrying Value															61,900
Letter of Credit [Member] | Title IV Letter Of Credit
Line of Credit Facility [Line Items]
Letters of credit outstanding															$ 179,000
Percentage of funds received															10.00%
Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 500,000									$ 400,000
Commitment fee percentage															0.25%
Undrawn amount on letters of credit															$ 500,000
Additional borrowing capacity		$ 100,000
Debt instrument, maturity date		Aug. 06, 2030
Line of credit															0	$ 0
Debt Issuance Costs Write-off															295
Capitalized debt issuance costs															$ 3,770
Amortization period															5 years
Revolving Credit Facility | Alternate Base Rate | Minimum
Line of Credit Facility [Line Items]
Basic spread rate		1.25%													2.75%
Revolving Credit Facility | Alternate Base Rate | Maximum
Line of Credit Facility [Line Items]
Basic spread rate		2.00%													3.25%
Revolving Credit Facility | SOFR
Line of Credit Facility [Line Items]
Floor rate															0.75%
Revolving Credit Facility | SOFR | Minimum
Line of Credit Facility [Line Items]
Basic spread rate		2.25%													3.75%
Revolving Credit Facility | SOFR | Maximum
Line of Credit Facility [Line Items]
Basic spread rate		3.00%													4.25%
Senior Secured Notes Due 2028 And Term B Loan
Line of Credit Facility [Line Items]
Amortization period															7 years
Senior Secured Notes Due 2028 And Term B Loan | Maximum | Scenario Plan
Line of Credit Facility [Line Items]
Total net leverage ratio															3.25
Senior Secured Notes Due 2028
Line of Credit Facility [Line Items]
Debt instrument, face amount													$ 800,000
Fixed interest rate													5.50%
Repayment of long-term debt									$ 373,300					$ 20,800			$ 900
Long-term debt, gross															$ 404,950			404,950
Percentage of notes issued on par value													100.00%
Redemption price, percentage of principal amount redeemed									100.00%					90.00%			92.00%
Debt Issuance Costs Write-off															0
Capitalized debt issuance costs															0
Senior Secured Notes Due 2028 | Accrued Liabilities
Line of Credit Facility [Line Items]
Debt Instrument, Accrued Interest															$ 1,900			7,400
Senior Secured Notes Due 2028 | 2024
Line of Credit Facility [Line Items]
Redemption price, percentage of principal amount redeemed													102.75%
Senior Secured Notes Due 2028 | 2025
Line of Credit Facility [Line Items]
Redemption price, percentage of principal amount redeemed													101.375%
Senior Secured Notes Due 2028 | 2026
Line of Credit Facility [Line Items]
Redemption price, percentage of principal amount redeemed													100.00%
Term B Loan
Line of Credit Facility [Line Items]
Debt instrument, face amount											$ 850,000
Fixed interest rate															6.91%
Repayment of long-term debt			$ 100,000		$ 50,000		$ 50,000	$ 100,000		$ 396,700
Long-term debt, gross															$ 153,333			$ 153,333
Reduction in margin interest rate				(0.75%)	(0.50%)
Principal payment												$ 2,125			0
Debt instrument, issuance price, percent of principal amount											99.00%
Debt instrument, issuance discount, percent											1.00%
Debt Issuance Costs Write-off															0
Capitalized debt issuance costs															$ 0
Term B Loan | Subsequent Event
Line of Credit Facility [Line Items]
Repayment of long-term debt	$ 50,000
Long-term debt, gross	$ 103,300
Term B Loan | Alternate Base Rate
Line of Credit Facility [Line Items]
Basic spread rate				1.75%
Term B Loan | Alternate Base Rate | Minimum
Line of Credit Facility [Line Items]
Basic spread rate					2.50%	3.00%
Term B Loan | Alternate Base Rate | Maximum
Line of Credit Facility [Line Items]
Basic spread rate					3.00%	3.50%
Term B Loan | SOFR
Line of Credit Facility [Line Items]
Basic spread rate				2.75%
Floor rate				0.75%	0.75%	0.75%
Term B Loan | SOFR | Minimum
Line of Credit Facility [Line Items]
Basic spread rate					3.50%	4.00%
Term B Loan | SOFR | Maximum
Line of Credit Facility [Line Items]
Basic spread rate					4.00%	4.50%

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- Definition

The amount of accrued interest on debt instrument for the period.

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Represents the ratio of consolidated total debt to consolidated adjusted earnings before, interest, taxes, depreciation and amortization allowed under the terms of the senior credit facilities' covenants.

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Percent of debt discount.

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Issuance price of debt instrument as a percent of principal amount.

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Percentage of floor on the variable rate.

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The amortization period of debt issuance costs.

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Represents the debt issuance costs capitalized during the period.

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Amount of additional borrowing capacity under the credit facility without consideration of any current restrictions.

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The percentage of consolidated funds received under Title IV programs.

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Percentage of notes issued on par value.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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Incremental percentage increase (decrease) in the stated rate on a debt instrument.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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Amount of the required periodic payments applied to principal.

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Percentage of principal amount of debt redeemed.

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The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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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 borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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