Stock-Based Compensation - Short-Term Incentive Plan - Additional Information (Detail)	6 Months Ended
Jun. 30, 2021 USD ($)
2021 STIP [Member] \| Certain Executives [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage Of Incentive Awards In Shares	50.00%
Percentage of incentive awards in cash	50.00%
2020 STIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from issuance of shares	$ 0

Amount of cash inflow from issuance of shares under share-based payment arrangement. Excludes option exercised.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=SL79508275-113901

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration