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Debt (Narrative) (Details) - USD ($) |  |  |  |  |  | 4 Months Ended | 8 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 21, 2023 | May 03, 2023 | Apr. 19, 2023 | Apr. 03, 2023 | Apr. 30, 2021 | Apr. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2023 | Dec. 31, 2022
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Repayments of Long-term Debt |  |  |  |  |  | $ 0 | $ 0 | $ 571,800,000 | $ 0
Loss on extinguishment of debt |  |  |  |  |  | 0 | $ 0 | 29,200,000 | 0
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  | $ 375,000,000 |  |  |  |  |
Line of Credit Facility, Additional Borrowing Capacity |  |  |  | 200,000,000 |  |  |  |  |
Line of Credit Facility, Fair Value of Amount Outstanding |  |  |  |  |  |  |  | $ 0 |
Revolving Credit Facility [Member] | Letter of Credit |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Line of Credit Facility, Additional Borrowing Capacity |  |  |  | $ 150,000,000 |  |  |  |  |
Federal Fund Rate Plus One Half Member | Revolving Credit Facility [Member] | Federal Funds Rate |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 0.50% |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Covenant, Restricted Cash |  |  |  |  | $ 175,000,000 | 175,000,000 |  |  |
Maximum | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Line of Credit Facility, Commitment Fee Percentage |  |  |  | 0.75% |  |  |  |  |
Maximum | Term SOFR Plus One Tenth Member | Revolving Credit Facility [Member] | Standards & Poor's Financial Services LLC |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 3.00% |  |  |  |  |
Maximum | Term SOFR Plus One Tenth Member | Revolving Credit Facility [Member] | Moody's Investors Service, Inc. |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 4.00% |  |  |  |  |
Maximum | Term SOFR Plus One Tenth Member | Revolving Credit Facility [Member] | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 0.10% |  |  |  |  |
Maximum | Term SOFR Plus One and One Tenth Member | Revolving Credit Facility [Member] | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 1.10% |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Covenant, Restricted Cash |  |  |  |  | 100,000,000 | 100,000,000 |  |  |
Minimum | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Line of Credit Facility, Commitment Fee Percentage |  |  |  | 0.375% |  |  |  |  |
Minimum | Term SOFR Plus One Tenth Member | Revolving Credit Facility [Member] | Standards & Poor's Financial Services LLC |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 1.50% |  |  |  |  |
Minimum | Term SOFR Plus One Tenth Member | Revolving Credit Facility [Member] | Moody's Investors Service, Inc. |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 2.50% |  |  |  |  |
Minimum | Term SOFR Plus One Tenth Member | Revolving Credit Facility [Member] | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 0.00% |  |  |  |  |
Minimum | Floor for Term SOFR and One and One Tenth Member | Revolving Credit Facility [Member] | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 1.00% |  |  |  |  |
First Lien Notes | Senior Notes [Member] |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  | $ 550,000,000 | 550,000,000 |  |  |
DebtInstrumentInterestRateAnnualPaymentPercent |  |  |  |  | 10.25% |  |  |  |
DebtInstrumentRedemptionPricePercentOfNetCashProceedsFromEquityOffering |  |  |  |  | 104.00% |  |  |  |
Debt Instrument, Consent Solicitation Costs |  |  |  |  |  |  |  |  | $ 3,900,000
Repayments of Long-term Debt |  | $ 571,800,000 |  |  |  |  |  |  |
Loss on extinguishment of debt |  | $ 29,200,000 |  |  |  |  |  |  |
First Lien Notes | Senior Notes [Member] | Debt Instrument Interest Rate Payout Option One Member |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
DebtInstrumentInterestRateAnnualPaymentPercent |  |  |  |  | 8.25% |  |  |  |
First Lien Notes | Senior Notes [Member] | Debt Instrument Interest Rate Payout Option Two Member |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
DebtInstrumentAnnualInterestPayoutPercentInCash |  |  |  |  | 5000.00% |  |  |  |
DebtInstrumentAnnualInterestPayoutPercentPaidInKind |  |  |  |  | 50.00% |  |  |  |
DebtInstrumentInterestRateAnnualPaymentPercentPaidInKind |  |  |  |  | 12.00% |  |  |  |
Senior Notes [Member] | First Lien Notes | Maximum |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Covenant, Investment Maximum |  |  |  |  | $ 175,000,000 | $ 175,000,000 |  |  |
Debt Instrument, Covenant, Investment Maximum, Percent Of Total Assets |  |  |  |  | 6.50% | 6.50% |  |  |
Senior Notes [Member] | First Lien Notes | Minimum |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Covenant, Investment Maximum |  |  |  |  | $ 100,000,000 | $ 100,000,000 |  |  |
Debt Instrument, Covenant, Investment Maximum, Percent Of Total Assets |  |  |  |  | 4.00% | 4.00% |  |  |
Initial Second Lien Notes | Senior Notes [Member] |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 700,000,000 |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  | $ 681,400,000 |  |  |  |  |  |
Debt Instrument, Triggering Event, Redemption Price Percentage |  |  |  | 101.00% |  |  |  |  |
Initial Second Lien Notes | Senior Notes [Member] | Debt Instrument Principle Percentage Redemption, Three |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage |  |  | 100.00% |  |  |  |  |  |
Additional Second Lien Notes | Senior Notes [Member] |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount | $ 400,000,000 |  |  |  |  |  |  |  |
Proceeds from Issuance of Debt | $ 396,900,000 |  |  |  |  |  |  |  |
Debt Instrument, Issued, Percentage of Par | 100.75% |  |  |  |  |  |  |  |
Debt Instrument, Increase, Accrued Interest | $ 11,400,000 |  |  |  |  |  |  |  |
Second Lien Notes | Senior Notes [Member] |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument interest rate stated percentage |  |  | 837.50% |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  | 8.76% |  |  |  |  |  |
Second Lien Notes | Senior Notes [Member] | Federal Fund Rate Plus One Half Member |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Principle redemption |  |  | 40.00% |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage |  |  | 108.375% |  |  |  |  |  |
Second Lien Notes | Senior Notes [Member] | Term SOFR Plus One Tenth Member |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Principle redemption |  |  | 10.00% |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage |  |  | 103.00% |  |  |  |  |  |
Second Lien Notes | Senior Notes [Member] | Debt Instrument, Redemption, Period One |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage |  |  | 104.188% |  |  |  |  |  |
Second Lien Notes | Senior Notes [Member] | Debt Instrument, Redemption, Period Three |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage |  |  | 100.00% |  |  |  |  |  |
Reorganization, Chapter 11, Plan Effect Adjustment |  |  |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  | $ 550,000,000 | $ 550,000,000 |  |  |
Debt Issuance Costs, Net |  |  |  |  | (5,200,000) | $ (5,200,000) |  |  |
Proceeds from Issuance of Debt |  |  |  |  | $ 500,000,000.0 |  |  |  |

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