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Background and Basis of Presentation - Additional Information (Detail) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2018
Background And Basis Of Presentation [Line Items] |  |  |
Business combination purchase price, net of cash acquired |  | $ 715.2 | $ 465.6
LARSON [Member] |  |  |
Background And Basis Of Presentation [Line Items] |  |  |
Business acquisition, percentage of outstanding equity acquired | 100.00% |  |
Business combination purchase price, net of cash acquired | $ 715.2 |  |

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- Definition Percentage of ownership interests acquired in acquisition. + References No definition available. + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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