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Derivatives - Summary of Various Interest Rate Hedges (Detail) - Incremental Term Loan Facility [Member] - Interest Rate Hedge [Member] - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Derivative [Line Items]
Fair Value Asset (Liability)	$ (5.4)	$ (14.0)
Swap Agreement One [Member]
Derivative [Line Items]
Trade Date	Apr. 03, 2019
Effective Date	Apr. 05, 2019
Maturity	Mar. 31, 2023
Fixed Rate	2.309%
Notional Amount at Effective Date	$ 300.0
Fair Value Asset (Liability)	$ (9.1)	(12.4)
Swap Agreement Two [Member]
Derivative [Line Items]
Trade Date	Oct. 29, 2020
Effective Date	Oct. 26, 2021
Maturity	Feb. 28, 2025
Fixed Rate	0.485%
Notional Amount at Effective Date	$ 200.0
Fair Value Asset (Liability)	$ 2.3	(0.7)
Swap Agreement Three [Member]
Derivative [Line Items]
Trade Date	Oct. 29, 2020
Effective Date	Mar. 31, 2022
Maturity	Feb. 28, 2025
Fixed Rate	0.623%
Notional Amount at Effective Date	$ 100.0
Fair Value Asset (Liability)	$ 1.4	$ (0.9)

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- Definition

Derivative effective dates.

+ References

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- Definition

Derivative trade dates.

+ References

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- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Date the derivative contract matures, in CCYY-MM-DD format.

+ References

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959

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