Share-based Compensation - Share-Based Compensation Expense and Related Tax Benefits (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] | |||
| Share-based compensation expense | $ 2,544 | $ 3,125 | $ 3,515 |
| Related tax benefits | $ 734 | $ 941 | $ 984 |
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- References No definition available.
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- Definition Amount of tax benefit for recognition of expense of award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of noncash expense for share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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