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Equity Compensation Plan - Additional Information (Detail) - USD ($) shares in Millions |  |  |  |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 26, 2021 | Aug. 05, 2021 | May 17, 2021 | May 04, 2021 | Feb. 25, 2021 | Aug. 27, 2020 | Feb. 27, 2020 | Jan. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |
Shares available for future awards (in shares) |  |  |  |  |  |  |  |  | 1.0 |  |
Acquisition and divestiture expenses |  |  |  |  |  |  |  |  | $ 5,300,000 | $ 2,900,000 | $ 500,000
Restricted Share Units |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |
Award vesting period |  |  |  |  |  |  |  | 3 years |  |  |
Unrecognized compensation cost |  |  |  |  |  |  |  |  | $ 6,800,000 |  |
Unrecognized compensation cost expected to be recognized over a weighted average remaining amortization period, years |  |  |  |  |  |  |  |  | 1 year 10 months 24 days |  |
Performance Shares - Equity |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |
Award performance period |  |  |  |  |  |  |  |  | 3 years |  |
Unrecognized compensation cash |  |  |  |  |  |  |  |  | $ 8,600,000 |  |
Unrecognized compensation cash expected to be recognized over a weighted average period, years |  |  |  |  |  |  |  |  | 1 year 8 months 12 days |  |
Employee Stock Option |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost |  |  |  |  |  |  |  |  | $ 2,200,000 |  |
Expiration period |  |  |  |  |  |  |  |  | 10 years |  |
Percentage of fair market value on the date of grant |  |  |  |  |  |  |  |  | 100.00% |  |
Average expected term | 5 years 7 months 6 days | 6 years | 6 years | 6 years | 6 years | 6 years | 6 years |  |  | 6 years |
Non-Employee Director |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |
Cash payments to settle phantom shares |  |  |  |  |  |  |  |  | $ 0 | $ 0 | 0
Non-Employee Director | Phantom Shares |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |  |  |  |  |
Value of award received |  |  |  |  |  |  |  |  | 110,000 | 110,000 | 110,000
Acquisition and divestiture expenses |  |  |  |  |  |  |  |  | $ 1,000,000 | $ 900,000 | $ 900,000

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- Definition Amount of expense recognized from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments), awarded to key employees or individuals. Excludes amount related to plans that cover generally all employees (for example, but not limited to, qualified pension plans). + References No definition available. + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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