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Long-Term Debt - Additional Information (Detail) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Sep. 16, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Debt Instrument [Line Items] |  |  |  |
Amortization of deferred finance costs |  | $ 0.4 | $ 1.0 | $ 0.7
Weighted average rate of interest on borrowings |  | 2.20% | 3.14% |
Payments of interest on long-term debt |  | $ 0.8 | $ 4.8 | 6.5
Net cash outflows in respect of refinancing costs |  | 0.3 | 1.5 | $ 0.0
Deferred finance costs, net |  | $ 1.3 | $ 1.4 |
Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Due date of revolving credit | Sep. 25, 2024 | Sep. 25, 2023 |  |
Deferred finance costs capitalized | $ 0.3 | $ 1.5 |  |

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- Definition Amount of the cost of borrowed funds accounted for as interest expense for debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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