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Long-Term Debt - Summary of Debt Refinancing Costs (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |  |
Gross cost at January 1 | $ 1.8 | $ 1.8 |
Written off | (1.8) | 0.0 |
Capitalized in the year | 1.4 | 0.0 |
Gross cost | 1.4 | 1.8 | $ 1.8
Accumulated amortization,Beginning Balance | (1.2) | (0.8) |
Written off | 1.4 | 0.0 |
Amortization in the year | (0.4) | (0.4) | (0.3)
Accumulated amortization,Ending balance | (0.2) | (1.2) | $ (0.8)
Deferred finance costs, net | $ 1.2 | $ 0.6 |

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- Definition Amount of accumulated amortization of debt issuance costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-3 + Details
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