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Stock-Based Compensation (Detail) - (Table 2) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Total | $ 5,732 | $ 6,028 | $ 16,939 | $ 17,636
Restricted Stock [Member] |  |  |  |
Allocated Share-based Compensation Expense | 4,647 | 4,695 | 14,138 | 14,250
Stock Options [Member] |  |  |  |
Allocated Share-based Compensation Expense | $ 1,085 | $ 1,333 | $ 2,801 | $ 3,386

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