Stock Compensation - Additional Information (Detail) - USD ($) $ in Millions |
3 Months Ended | |
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Mar. 31, 2021 |
Mar. 31, 2020 |
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Performance-Based Awards [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Performance period | 3 years | |
Performance-Based Awards [Member] | Minimum [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Payout percentage of performance awards | 0.00% | |
Performance-Based Awards [Member] | Maximum [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Payout percentage of performance awards | 200.00% | |
2017 Plan [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Number of shares that remain available for grant | 5,121,800 | |
Recognized compensation expense | $ 12.0 | $ 12.4 |
Unrecognized compensation cost related to nonvested common shares | $ 92.9 | |
Weighted average period for recognition of cost | 2 years 21 days |
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- Definition Payout percentage of performance awards. No definition available.
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- Definition Share-based compensation arrangement by share-based payment award, performance period. No definition available.
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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. No definition available.
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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