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Stock-Based Compensation (Detail) - (Table 2) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Total | $ 5,686 | $ 5,671
Restricted Stock [Member] |  |
Allocated Share-based Compensation Expense | 4,864 | 4,617
Stock Options [Member] |  |
Allocated Share-based Compensation Expense | $ 822 | $ 1,054

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