Stock Compensation - Summary of Stock-Based Instruments (Detail) - $ / shares |
9 Months Ended | |
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Sep. 30, 2021 |
Sep. 30, 2020 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Granted, shares | 916,800 | |
| Weighted-Average Grant-Date Fair Value, shares | $ 44.17 | |
| Restricted Stock [Member] | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Granted, shares | 699,300 | 1,069,300 |
| Weighted-Average Grant-Date Fair Value, shares | $ 43.40 | $ 36.52 |
| Performance-Based Restricted Stock [Member] | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Granted, shares | 108,750 | 0 |
| Weighted-Average Grant-Date Fair Value, shares | $ 38.95 | $ 0 |
| Market-Based Restricted Stock [Member] | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Granted, shares | 108,750 | 0 |
| Weighted-Average Grant-Date Fair Value, shares | $ 54.34 | $ 0 |
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). 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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