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Debt (Additional Information) (Details) - USD ($) |  |  |  |  |  |  | 3 Months Ended | 15 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 12, 2021 | Jul. 29, 2021 | Mar. 01, 2021 | Feb. 12, 2021 | Mar. 24, 2020 | Apr. 13, 2018 | Mar. 31, 2024 | Sep. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2020 | Dec. 31, 2016 | Dec. 31, 2022 | Jun. 30, 2021
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of long-term debt |  |  |  |  |  |  |  | $ 291,000,000 |  | $ 750,000 |  |  |
Letters of credit outstanding | $ 83,600,000 |  |  |  |  |  |  | $ 153,400,000 |  | 68,400,000 | $ 68,400,000 |  | $ 68,400,000
Letter Of Credit Title Iv Disbursement Percentage |  |  |  |  |  |  |  |  |  |  | 10.00% |  |
Letter of credit, repayment period |  |  |  |  |  |  |  |  |  |  | 5 years |  |
Annual fee percentage |  |  |  |  |  |  |  | 4.25% |  |  |  |  |
Credit annual fee percentage reimbursement |  |  |  |  |  |  |  | 2.00% |  |  |  |  |
Commitment fee percentage |  |  |  |  |  |  |  | 0.25% |  |  |  |  |
Undrawn amount on letters of credit |  |  |  |  |  |  |  | $ 246,600,000 |  |  |  |  |
Line of Credit facility, initiation date |  |  |  |  |  | Apr. 13, 2018 |  |  |  |  |  |  |
Amortization of debt issuance costs |  |  |  |  |  |  |  | $ 17,858,000 |  | 392,000 |  |  |
Fronting fee percentage |  |  |  |  |  |  |  | 0.125% |  |  |  |  |
Interest Rate Swap |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax |  |  |  |  |  |  |  | $ (4,525,000) |  |  |  |  |
Interest Rate Swap | Interest Expense [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax |  | $ (4,500,000) |  |  |  |  |  |  |  |  |  |  |
Revolver [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ 400,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Term |  |  |  |  |  |  |  |  | 5 years |  |  |  |
Revolver [Member] | LIBOR Floor [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  |  |  |  | 0.75% |  |  |  |  |
Revolver [Member] | LIBOR Floor [Member] | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  |  |  |  | 3.75% |  |  |  |  |
Revolver [Member] | LIBOR Floor [Member] | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  |  |  |  | 4.25% |  |  |  |  |
Revolver [Member] | Alternate Base Rate [Member] | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  |  |  |  | 2.75% |  |  |  |  |
Revolver [Member] | Alternate Base Rate [Member] | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  |  |  |  | 3.25% |  |  |  |  |
Prior Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | $ 300,000,000 |  |  |  |  |  |  |
Line of credit facility, expiration date |  |  |  |  |  | Apr. 13, 2023 |  |  |  |  |  |  |
Long-term Line of Credit |  |  |  |  |  |  |  |  |  | $ 0 |  |  | 0
Debt Issuance Costs Write-off |  |  |  |  |  |  |  | $ 6,000,000 |  |  |  |  |
Prior Revolving Credit Facility [Member] | Interest Expense [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Issuance Costs Write-off |  |  |  |  |  |  |  | $ 6,000,000.0 |  |  |  |  |
Prior Revolving Credit Facility [Member] | Base Rate [Member] | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Application rate, percentage |  |  |  |  |  |  |  |  | 0.75% |  |  |  |
Prior Revolving Credit Facility [Member] | Base Rate [Member] | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Application rate, percentage |  |  |  |  |  |  |  |  | 1.75% |  |  |  |
Prior Revolving Credit Facility [Member] | Eurocurrency Rate [Member] | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Application rate, percentage |  |  |  |  |  |  |  | 1.75% |  |  |  |  |
Prior Revolving Credit Facility [Member] | Eurocurrency Rate [Member] | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Application rate, percentage |  |  |  |  |  |  |  | 2.75% |  |  |  |  |
Term Loan B |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  | $ 850,000,000 |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Price, Percent Of Principal Amount | 99.00% |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Discount, Percent | 1.00% |  |  |  |  |  |  |  |  |  |  |  |
Bridge |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Issuance Costs Write-off |  |  |  |  |  |  |  | $ 10,329,000 |  |  |  |  |
Bridge | Interest Expense [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Issuance Costs Write-off |  |  |  |  |  |  |  | $ 10,300,000 |  |  |  |  |
Senior Secured Notes Due 2028 And Term B Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Term |  |  |  |  |  |  |  |  | 7 years |  |  |  |
Cap percentage |  |  |  |  |  |  |  | 20.00% |  |  |  |  |
Senior Secured Notes Due 2028 And Term B Loan [Member] | Scenario, Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total net leverage ratio |  |  |  |  |  |  | 3.25% |  |  |  |  | 4.00% |
Senior Secured Notes Due 2028 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | $ 800,000,000 |  |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 5.50% |  |  |  |  |  |  |  |  |  |
Percentage of notes issued on par value |  |  | 100.00% |  |  |  |  |  |  |  |  |  |
Redemption price, percentage of principal amount redeemed |  |  | 100.00% |  |  |  |  |  |  |  |  |  |
Debt covenant, percentage of principal amount of notes outstanding |  |  | 25.00% |  |  |  |  |  |  |  |  |  |
Senior Secured Notes Due 2028 [Member] | Accrued Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Accrued Interest |  |  |  |  |  |  |  | $ 3,700,000 |  |  |  |  | 14,700,000
Senior Secured Notes Due 2028 [Member] | 2024 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price, percentage of principal amount redeemed |  |  | 102.75% |  |  |  |  |  |  |  |  |  |
Senior Secured Notes Due 2028 [Member] | 2025 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price, percentage of principal amount redeemed |  |  | 101.375% |  |  |  |  |  |  |  |  |  |
Senior Secured Notes Due 2028 [Member] | 2026 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price, percentage of principal amount redeemed |  |  | 100.00% |  |  |  |  |  |  |  |  |  |
Senior Secured Notes Due 2028 [Member] | Prior to March 1,2024 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price percentage |  |  | 105.50% |  |  |  |  |  |  |  |  |  |
Senior Secured Notes Due 2028 [Member] | Maximum | Prior to March 1,2024 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price, percentage of principal amount redeemed |  |  | 40.00% |  |  |  |  |  |  |  |  |  |
Term B Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | $ 850,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  |  |  |  |  |  | 5.25% |  |  |  |  |
Debt Instrument, Ticking Fee, Term |  |  |  | 30 days |  |  |  |  |  |  |  |  |
Debt Instrument, Ticking Fee, Percent |  |  |  | 50.00% |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  | 4.50% |  |  |  |  |  |  |  |  |
Principal payment | $ 2,125,000 |  |  |  |  |  |  |  |  |  |  |  |
Term B Loan [Member] | Accrued Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued Ticking Fees |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,300,000
Term B Loan [Member] | LIBOR Floor [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate | 0.75% |  |  | 0.75% |  |  |  |  |  |  |  |  |
Term B Loan [Member] | Alternate Base Rate [Member] | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate | 3.00% |  |  |  |  |  |  |  |  |  |  |  |
Term B Loan [Member] | Alternate Base Rate [Member] | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate | 3.50% |  |  |  |  |  |  |  |  |  |  |  |
Term B Loan [Member] | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  | 4.50% |  |  |  |  |  |  |  |  |
Term B Loan [Member] | Eurocurrency Rate [Member] | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate | 4.00% |  |  |  |  |  |  |  |  |  |  |  |
Term B Loan [Member] | Eurocurrency Rate [Member] | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate | 4.50% |  |  |  |  |  |  |  |  |  |  |  |
Prior Term Loan B [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  | $ 300,000,000 |  |  |  |  |  |  |
Repayment of long-term debt | $ 291,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |
Principal payment |  |  |  |  |  | $ 750,000 |  |  |  |  |  |  |
Interest rate for borrowings under the Term B Loan facility |  |  |  |  |  |  |  |  |  | 3.15% |  |  | 3.10%
Debt instrument, maturity date |  |  |  |  |  | Apr. 13, 2025 |  |  |  |  |  |  |
Prior Term Loan B [Member] | Base Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  |  |  |  | 2.00% |  |  |  |  |
Debt instrument, description of variable rate basis |  |  |  |  |  |  |  | base rate plus 2% |  |  |  |  |
Prior Term Loan B [Member] | Eurocurrency Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  | 3.00% |  |  | 3.00% |  |  |  |  |
Debt instrument, description of variable rate basis |  |  |  |  |  |  |  | LIBOR-equivalent rate plus 3% |  |  |  |  |
Prior Term Loan B [Member] | Interest Rate Swap |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Fixed Interest Rate |  |  |  |  | 0.946% |  |  |  |  |  |  |  |
Derivative, Swaption Interest Rate |  |  |  |  |  |  |  | 3.946% |  |  |  |  |
Prior Term Loan B [Member] | Interest Rate Swap | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, description of variable rate basis |  |  |  |  | one-month LIBOR |  |  |  |  |  |  |  |
Prior Term Loan B [Member] | Interest Rate Swap | LIBOR | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Floor Interest Rate |  |  |  |  | 0.00% |  |  |  |  |  |  |  |

X
- Definition The amount of accrued fees incurred as at the end of the reporting period. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Percentage of principal amount of notes outstanding related to debt covenant. + References No definition available. + Details
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- Definition The amount of accrued interest on debt instrument for the period. + References No definition available. + Details
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- Definition Represents the ratio of consolidated adjusted earnings before interest, taxes, depreciation and amortization to interest expense, which is necessary to be maintained under the terms of the senior credit facilities' covenants. + References No definition available. + Details
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- Definition 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. + References No definition available. + Details
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- Definition Percent of debt discount. + References No definition available. + Details
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- Definition Issuance price of debt instrument as a percent of principal amount. + References No definition available. + Details
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- Definition Debt instrument accruing ticking fees as a percent of margin. + References No definition available. + Details
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- Definition Term debt instrument term ticking fees accrue. + References No definition available. + Details
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- Definition Represents the annual fee percentage on letter of credit. + References No definition available. + Details
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Balance Type: | na
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- Definition Represent the letter of credit annual fee percentage reimbursement. + References No definition available. + Details
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- Definition Represents the fronting fee percentage on letter of credit. + References No definition available. + Details
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- Definition Repayment period for letter of credit, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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Balance Type: | na
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- Definition Percentage of letter of credit disbursements. + References No definition available. + Details
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- Definition Percentage of notes issued on par value. + References No definition available. + Details
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- Definition Amount of amortization expense attributable to debt issuance costs. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(8)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1F -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28555-108399 + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Description of reference rate used for variable rate of debt instrument. + References No definition available. + Details
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