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Commitments and Contingencies - Additional Information (Detail) - Derivative Litigation - Positive Outcome of Litigation - USD ($) $ in Millions	3 Months Ended	4 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2020
Commitments and Contingencies [Line Items]
Net proceeds received from settlement agreement becoming effective and final		$ 27.7
General and Administrative Expense
Commitments and Contingencies [Line Items]
Gain related to settlement agreement becoming effective and final, recognized as reduction of general and administrative expense	$ 27.7		$ 27.7

X

- Definition

Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349

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- Definition

Cash received for the settlement of litigation during the current period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585

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Commitments And Contingencies [Line Items]

+ References

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