Equity-Based Compensation - Summary of Key Assumptions Used for Fair Value Computation (Detail) - Performance Based Awards	12 Months Ended
Dec. 31, 2019
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items]
Expected holding period	2 years 10 months 24 days
Risk–free rate of return (as a percent)	2.46%
Expected dividend yield (as a percent)	5.12%

Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items]

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

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