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Debt (Additional Information) (Details) - USD ($) $ in Thousands |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended |
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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 Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 605 -Name Accounting Standards Codification -Section 55 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477548/944-605-55-15 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 605 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477548/944-605-55-12 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481544/470-10-50-6 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481544/470-10-50-6 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481544/470-10-50-6 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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