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v3.24.3

Long Term Debt - Additional Information (Detail) $ / shares in Units, $ in Millions |  |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |
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Sep. 19, 2024 USD ($) | Jul. 18, 2024 USD ($) | May 28, 2024 USD ($) | May 01, 2024 USD ($) | Feb. 29, 2024 USD ($) | Jan. 31, 2024 USD ($) | Sep. 30, 2024 USD ($) $ / shares | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) $ / shares | Sep. 30, 2024 USD ($) $ / shares | Sep. 30, 2024 USD ($) $ / shares | Sep. 30, 2024 USD ($) d $ / shares | Sep. 30, 2024 USD ($) $ / shares | Sep. 30, 2024 USD ($) Tradingday $ / shares | Sep. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) $ / shares | Jul. 09, 2024
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on debt amendments and extinguishments |  |  |  |  |  |  | $ 3.0 | $ 0.0 |  | $ 5.5 |  |  |  |  | $ 10.7 |  |
Accumulated gain on swaps amortized to interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7.0 |
Interest Rate Swap Agreements Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative notional amount |  |  |  |  | $ 137.5 | $ 137.5 |  |  |  |  |  |  |  |  |  |  |
Maturity date |  |  |  |  | Dec. 31, 2026 | Dec. 31, 2027 |  |  |  |  |  |  |  |  |  |  |
5.875% Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  | 5.875% |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.875%
Aggregate principal amount outstanding | $ 59.7 | $ 59.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Redemption Price Percentage Of Principal Amount Redeemed | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes bond offering date |  | Jul. 09, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  | 5.875% |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.875%
Tender offer amount |  | $ 345.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
4.50 % Convertible Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  | 4.50% |  | 4.50% | 4.50% | 4.50% | 4.50% | 4.50% | 4.50% |  |  |
Debt instrument, convertible, threshold trading days |  |  |  |  |  |  |  |  |  |  |  | 30 |  | 20 |  |  |
Debt instrument, convertible, threshold consecutive trading days | Tradingday |  |  |  |  |  |  |  |  |  |  |  |  |  | 30 |  |  |
Conversion price per share, percentage |  |  |  |  |  |  |  |  |  |  |  |  | 130.00% |  |  |  |
Initial conversion price | $ / shares |  |  |  |  |  |  | $ 14.35 |  | $ 14.35 | $ 14.35 | $ 14.35 | $ 14.35 | $ 14.35 | $ 14.35 |  | $ 14.35 |
Senior note convertible debt |  |  |  |  |  |  | May 15, 2025 |  | May 15, 2025 | May 15, 2025 | May 15, 2025 | May 15, 2025 | May 15, 2025 | May 15, 2025 |  |  |
Debt instrument, interest rate, stated percentage |  |  |  |  |  |  | 4.50% |  | 4.50% | 4.50% | 4.50% | 4.50% | 4.50% | 4.50% |  |  |
7.00% Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount outstanding under the term loan |  | $ 500.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  | 7.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, maturity date |  | Aug. 01, 2032 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs |  | $ 8.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Redemption Price Percentage Of Principal Amount Redeemed |  |  |  |  |  |  |  |  |  |  |  |  | 107.00% |  |  |  |
Debt instrument, redemption price, percentage |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |
Debt instrument, interest rate, stated percentage |  | 7.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Premium to repurchase upon change in control |  |  |  |  |  |  |  |  |  |  |  |  | 101.00% |  |  |  |
CUSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average interest rate on outstanding borrowings |  |  |  |  |  |  | 6.90% |  | 6.90% | 6.90% | 6.90% | 6.90% | 6.90% | 6.90% |  |  |
Loss on debt amendments and extinguishments |  |  |  |  |  |  | $ 3.0 | $ 0.0 |  | $ 5.5 |  |  |  |  | $ 10.7 |  |
Interest rate |  |  |  | 8.75% |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs |  |  |  |  |  |  | 28.5 |  | $ 28.5 | 28.5 | $ 28.5 | $ 28.5 | $ 28.5 | $ 28.5 |  | $ 27.5 |
Debt instrument, interest rate, stated percentage |  |  |  | 8.75% |  |  |  |  |  |  |  |  |  |  |  |  |
CUSA [Member] | 5.875% Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount that is outstanding after tender |  | $ 405.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CUSA [Member] | 8.75 % Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount that is outstanding after tender |  |  |  | $ 150.0 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, Accrued interest |  |  |  | 156.6 |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on debt amendments and extinguishments |  |  |  | $ 1.0 |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  | 8.75% |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  |  | 8.75% |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum [Member] | 4.50 % Convertible Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold trading days | d |  |  |  |  |  |  |  |  |  |  |  | 20 |  |  |  |  |
Sale price per share | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 18.66 |  |  |  |  |  |
Maximum [Member] | 7.00% Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redeemable principal outstanding, percentage |  |  |  |  |  |  |  |  |  |  |  |  | 40.00% |  |  |  |
Term Loan Credit facility | Senior Secured Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reduction in Interest Rate |  |  | 0.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reset Soft Call Intrest Rate |  |  | 101.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term Loan Credit facility | CUSA [Member] | Senior Secured Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarterly principal payments due |  |  |  |  |  |  |  |  |  | 1.6 |  |  |  |  |  |  |
Debt issuance costs |  |  | $ 1.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized debt issuance costs |  |  | 0.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Legal and other fees |  |  | 0.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Write off amount of unamortized debt issuance costs and original issue discount |  |  | $ 1.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Last quarterly payment date |  |  |  |  |  |  |  |  | Mar. 31, 2030 |  |  |  |  |  |  |  |
Final principal payment due date |  |  |  |  |  |  |  |  | May 24, 2030 |  |  |  |  |  |  |  |
Revolving Credit Line | Amended Senior Secured Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount outstanding under the term loan |  |  |  |  |  |  | 640.3 |  | $ 640.3 | 640.3 | $ 640.3 | $ 640.3 | $ 640.3 | 640.3 |  |  |
Amount outstanding under the revolving credit line |  |  |  |  |  |  | $ 0.0 |  | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0 |  |  |

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