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Long-Term Debt - Senior Secured Notes due 2029 - Additional Information (Detail) - USD ($) $ in Millions |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 15, 2026 | Apr. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Debt Instrument [Line Items] |  |  |  |  |  |  |
Senior Secured Note, Discount Amount |  | $ 35.5 |  |  |  |  |
Interest expense |  |  | $ 55.4 | $ 60.4 | $ 110.0 | $ 102.0 |
Outstanding principal amount |  |  | 2,206.5 |  | 2,206.5 |  |
12.250 Senior Secured Notes due 2029 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Aggregate principal amount of senior notes issued |  | $ 800.0 |  |  |  |  |
Debt instrument interest rate |  | 12.25% |  |  |  |  |
Debt instrument maturity date |  | Apr. 15, 2029 |  |  |  |  |
Senior Secured Note, Discount Percentage |  | 2.702% |  |  |  |  |
Senior Secured Note, Discount Amount |  | $ 21.6 |  |  |  |  |
Deferred financing costs |  | $ 13.9 |  |  |  |  |
Non-cash interest expense |  |  | 0.9 | 0.7 | 1.7 | 0.7 |
Amortization of deferred financing costs |  |  | 0.6 | 0.4 | 1.1 | 0.4 |
Unamortized debt discount and debt issuance costs |  |  | 29.0 |  | 29.0 |  | $ 31.8
Senior secured notes, carrying amount |  |  | 771.0 |  | 771.0 |  | 768.2
Fair value of notes |  |  | 877.2 |  | 877.2 |  | 851.3
Interest expense |  |  | 25.9 | $ 22.6 | 51.8 | $ 22.6 |
Outstanding principal amount |  |  | $ 800.0 |  | $ 800.0 |  | $ 800.0
12.250 Senior Secured Notes due 2029 [Member] | Forecast [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Senior notes, redemption price, percentage | 100.00% |  |  |  |  |  |
Senior notes, redemption price percentage with equity offerings | 112.25% |  |  |  |  |  |
12.250 Senior Secured Notes due 2029 [Member] | Forecast [Member] | Maximum [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Percentage of aggregate principal amount of senior notes being redeemed | 40.00% |  |  |  |  |  |

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