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Summary of Restricted Stock Award Activity (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Restricted stock grants vested |  | 617,607 |  |
Restricted Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Restricted stock grants vested |  |  | 832,609 | 209,821
Compensation expense recognized during the period | [1] | $ 22,846 | $ 15,473 | $ 10,185
Fair value of restricted shares that vested during the period |  | 10,998 | 16,870 | 8,024
Income tax deduction and benefit recognized upon vesting of restricted stock and restricted stock unit awards |  | $ 1,048 | $ 5,620 | $ 1,516
Restricted Stock Units (RSUs) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Restricted stock grants vested |  | 232,200 | 208,204 | 90,895
Accumulated dividends paid upon vesting of restricted stock unit awards | [2] | $ 62 | $ 942 | $ 386
Compensation expense recognized during the period | [3] | 6,425 | 3,931 | 4,430
Fair value of restricted shares that vested during the period |  | 4,095 | 5,050 | 3,658
Income tax deduction and benefit recognized upon vesting of restricted stock and restricted stock unit awards |  | $ 691 | $ 788 | $ 397
[1] | The former CEO of the Company retired on December 31, 2021, and all of his outstanding unvested shares vested upon his retirement in accordance with his employment agreement. The Company recorded incremental compensation expense of $4,277 related to the accelerated vesting of these awards during the year ended December 31, 2021.
[2] | Approximately $296 of dividends were payable to the former CEO on December 31, 2021 and were paid in January 2022. These dividends were included in other current liabilities on the consolidated balance sheet as of December 31, 2021.
[3] | The former CEO of the Company retired on December 31, 2021, and all of his outstanding unvested restricted stock units vested upon his retirement in accordance with his employment agreement. The Company recorded incremental compensation expense of $2,374 related to the accelerated vesting of these awards during the year ended December 31, 2021.

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