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Financial Instruments and Risk Management - Interest Rate Risk (Details) - USD ($) | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 06, 2021 | Dec. 05, 2021 | Dec. 31, 2020
Disclosure of detailed information about hedging instruments [line items] |  |  |  |  |  |
Fair value gain/(loss) |  | $ 5,200,000 |  |  |  |
Interest rate swaps |  |  |  |  |  |
Disclosure of detailed information about hedging instruments [line items] |  |  |  |  |  |
Reasonably possible change in risk variable, impact on interest expense | $ 6,100,000 |  |  |  |  |
Reasonably possible change in risk variable, unhedged items, impact on interest expense | 2,800,000 |  |  |  |  |
Fair value gain/(loss) | 13,200,000 | 18,700,000 |  |  |  |
Reasonably possible change in risk variable, increase, impact on unrealized gain (loss) | 5,800,000 |  |  |  |  |
Reasonably possible change in risk variable, decrease, impact on unrealized gain (loss) | $ 5,700,000 |  |  |  |  |
Reasonably possible change in risk variable, percentage | 1.00% |  |  |  |  |
Credit Facility |  |  |  |  |  |
Disclosure of detailed information about hedging instruments [line items] |  |  |  |  |  |
Borrowings | $ 608,900,000 | 627,200,000 |  |  |  |
Revolving Credit Facility |  |  |  |  |  |
Disclosure of detailed information about hedging instruments [line items] |  |  |  |  |  |
Borrowings | 0 | 0 |  |  |  |
Initial Term Loan |  |  |  |  |  |
Disclosure of detailed information about hedging instruments [line items] |  |  |  |  |  |
Borrowings | 280,400,000 | 280,400,000 |  | $ 350,000,000.0 |  |
Unhedged borrowings | 180,400,000 | 180,400,000 |  |  |  |
Initial Term Loan | Interest rate swaps | Initial Swaps |  |  |  |  |  |
Disclosure of detailed information about hedging instruments [line items] |  |  |  |  |  |
Hedged item, liabilities | 100,000,000.0 |  |  |  |  |
Initial Term Loan | Interest rate swaps | First Extended Initial Swaps |  |  |  |  |  |
Disclosure of detailed information about hedging instruments [line items] |  |  |  |  |  |
Hedged item, liabilities | 100,000,000.0 |  |  |  |  |
Second Incremental Term Loan |  |  |  |  |  |
Disclosure of detailed information about hedging instruments [line items] |  |  |  |  |  |
Borrowings |  |  |  | $ 365,000,000.0 |  |
Second Incremental Term Loan | Interest rate swaps | First Extended Initial Swaps |  |  |  |  |  |
Disclosure of detailed information about hedging instruments [line items] |  |  |  |  |  |
Hedged item, liabilities | 100,000,000.0 |  |  |  |  |
Second Incremental Term Loan | Interest rate swaps | Additional Incremental Swaps |  |  |  |  |  |
Disclosure of detailed information about hedging instruments [line items] |  |  |  |  |  |
Hedged item, liabilities | 130,000,000.0 |  |  |  |  |
Second Incremental Term Loan | Interest rate swaps | Incremental Swaps |  |  |  |  |  |
Disclosure of detailed information about hedging instruments [line items] |  |  |  |  |  |
Hedged item, subject to cancellation | 50,000,000.0 |  |  |  |  |
Term Loans |  |  |  |  |  |
Disclosure of detailed information about hedging instruments [line items] |  |  |  |  |  |
Borrowings | 608,900,000 | 627,200,000 | $ 660,400,000 |  |  | $ 470,400,000
Unhedged borrowings | 278,900,000 | 297,200,000 |  |  |  |
Term Loans | Interest rate swaps |  |  |  |  |  |
Disclosure of detailed information about hedging instruments [line items] |  |  |  |  |  |
Hedged item, liabilities | 330,000,000.0 |  |  |  |  |
Incremental Term Loan |  |  |  |  |  |
Disclosure of detailed information about hedging instruments [line items] |  |  |  |  |  |
Borrowings | 328,500,000 | 346,800,000 |  |  | $ 250,000,000.0 |
Unhedged borrowings | $ 98,500,000 | $ 116,800,000 |  |  |  |

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