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Stock-Based Compensation (Detail) - (Table 2) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Total | $ 5,521 | $ 5,937 | $ 11,207 | $ 11,608
Restricted Stock [Member] |  |  |  |
Allocated Share-based Compensation Expense | 4,627 | 4,938 | 9,491 | 9,555
Stock Options [Member] |  |  |  |
Allocated Share-based Compensation Expense | $ 894 | $ 999 | $ 1,716 | $ 2,053

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