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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

Background and Basis of Presentation.

+ References

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- Definition

Percentage of ownership interests acquired in acquisition.

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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

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