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Debt (Additional Information) (Details) - USD ($) $ in Thousands |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 22, 2022 | Sep. 22, 2022 | Apr. 11, 2022 | Mar. 11, 2022 | Aug. 12, 2021 | Mar. 01, 2021 | Jun. 30, 2022 | Mar. 31, 2024 | Sep. 30, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2021 | Nov. 09, 2023 | Jun. 30, 2023
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of long-term debt |  |  |  |  |  |  |  |  | $ 0 | $ 100,861 |  |  |  |  |  |
Gain on extinguishment of debt |  |  |  |  |  |  |  |  | 0 | 71 |  |  |  |  |  |
Long-term debt, gross |  |  |  |  |  |  |  |  | 708,283 |  |  |  |  |  |  | $ 708,283
Surety Bond [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Guarantor Obligations, Current Carrying Value |  |  |  |  |  |  |  |  | 31,400 |  |  |  |  |  |  |
Revolver |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  | $ 400,000 |  |  |  |  |  |  |  |  |  |  |
Letters of credit outstanding |  |  |  |  |  |  |  |  | 76,200 |  |  |  |  |  |  |
Long-term Line of Credit |  |  |  |  |  |  |  |  | $ 0 | 0 |  |  |  |  |  |
Term |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |
Revolver | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Undrawn amount on letters of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 165,900 |
Revolver | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 157,900 |
Revolver | LIBOR Floor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  |  |  |  |  | 0.75% |  |  |  |  |  |  |
Revolver | LIBOR Floor | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  |  |  |  |  | 3.75% |  |  |  |  |  |  |
Revolver | LIBOR Floor | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  |  |  |  |  | 4.25% |  |  |  |  |  |  |
Revolver | Alternate Base Rate | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  |  |  |  |  | 2.75% |  |  |  |  |  |  |
Revolver | Alternate Base Rate | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  |  |  |  |  | 3.25% |  |  |  |  |  |  |
Walden Title IV Letter Of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit outstanding |  |  |  |  |  |  |  |  | $ 84,000 |  |  |  |  |  |  |
Commitment fee percentage |  |  |  |  |  |  |  |  | 0.25% |  |  |  |  |  |  |
Undrawn amount on letters of credit |  |  |  |  |  |  |  |  | $ 323,800 |  |  |  |  |  |  |
Senior Secured Notes Due 2028 And Term B Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term |  |  |  |  |  |  |  |  |  |  |  |  |  | 7 years |  |
Cap percentage |  |  |  |  |  |  |  |  | 20.00% |  |  |  |  |  |  |
Senior Secured Notes Due 2028 And Term B Loan | Scenario, Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total net leverage ratio |  |  |  |  |  |  |  | 3.25% |  |  |  |  | 4.00% |  |  |
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 | $ 394,100 |  |  |  |  |
Gain on extinguishment of debt |  |  |  |  |  |  |  |  |  | $ 100 |  |  |  |  |  |
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% |  |  | 100.00% | 90.00% |  |  | 92.00% |  |  |  |  |  |
Debt covenant, percentage of principal amount of notes outstanding |  |  |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |
Debt Issuance Costs Write-off |  |  |  |  |  |  |  |  | 0 | $ 15 |  |  |  |  |  |
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% |  |  |  |  |  |  |  |  |  |
Senior Secured Notes Due 2028 | Prior to March 1,2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price percentage |  |  |  |  |  | 105.50% |  |  |  |  |  |  |  |  |  |
Senior Secured Notes Due 2028 | Maximum | Prior to March 1,2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price, percentage of principal amount redeemed |  |  |  |  |  | 40.00% |  |  |  |  |  |  |  |  |  |
Term B Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  | 850,000 |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  |  |  |  |  |  |  | 9.43% |  |  |  |  |  |  |
Repayment of long-term debt | $ 50,000 | $ 100,000 |  | $ 396,700 | $ 396,700 |  |  |  |  | 100,000 |  |  |  |  |  |
Long-term debt, gross |  |  |  |  |  |  |  |  | $ 303,333 |  |  |  |  |  |  | $ 303,333
Principal payment |  |  |  |  |  |  |  |  |  |  |  | $ 2,125 |  |  |  |
Debt Instrument, Issuance Price, Percent Of Principal Amount |  |  |  |  | 99.00% |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Discount, Percent |  |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |
Debt Issuance Costs Write-off |  |  |  |  |  |  |  |  | $ 0 | $ 2,880 |  |  |  |  |  |
Asset sale or disposition period |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |
Asset sale or disposition investments |  |  |  |  |  |  |  |  | $ 20,000 |  |  |  |  |  |  |
Mandatory prepayment terms |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |
Term B Loan | LIBOR Floor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  | 0.75% |  |  |  |  |  |  |  |  |  |  |
Term B Loan | Alternate Base Rate | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  | 3.00% |  |  |  |  |  |  |  |  |  |  |
Term B Loan | Alternate Base Rate | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  | 3.50% |  |  |  |  |  |  |  |  |  |  |
Term B Loan | Eurocurrency Rate | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  | 4.00% |  |  |  |  |  |  |  |  |  |  |
Term B Loan | Eurocurrency Rate | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  | 4.50% |  |  |  |  |  |  |  |  |  |  |

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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://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//1943274/2147479440/944-210-S99-1 Reference 3: 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//1943274/2147479853/942-210-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 S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 + 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 -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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