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Stock-based Compensation - Summary of PSU Activity (Detail) (Potential Performance Shares (PSU)) - Performance Share Units (PSU) - USD ($) $ / shares in Units, $ 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, Non-Option Equity Instruments, Outstanding [Roll Forward] |  |  |
Beginning balance, number of units, outstanding | 1,136,488 |  |
Number of units, granted | 220,929 | 232,000 | 619,000
Number of unit, forfeitures | (307,507) |  |
Ending balance, number of units, outstanding | 1,049,910 | 1,136,488 |
Beginning balance, weighted average grant price, outstanding | $ 9.33 |  |
Weighted average grant price, granted | 8.56 | $ 8.37 | $ 7.85
Weighted average grant price, forfeitures | 12.93 |  |
Ending balance, weighted average grant price, outstanding | $ 8.11 | $ 9.33 |
Number of PSUs granted | 220,929 | 232,000 | 619,000
Grant date fair value | $ 1,891 | $ 1,943 | $ 4,857
Grant date fair value per unit | $ 8.56 | $ 8.37 | $ 7.85
Compensation expense recognized for PSUs | $ 3,392 | $ 3,217 | $ 1,899
Unrecognized compensation expense related to unvested shares | $ 3,444 |  |
Expected recognition period | 1 year 7 months 6 days |  |

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