Share-Based Compensation - Summary of Valuation Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
Sep. 30, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Weighted-average fair value (per share)			$ 9.96	$ 10.55
Total stock-based compensation expense	$ 533	$ 474	$ 1,710	$ 2,338
Total income tax impact on provision			$ 1,299	$ 240

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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