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Share Incentive and Other Compensation - Employee Share Purchase Plan and Deferred Share Plan - Additional Information (Details) - USD ($) | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Employee share purchase discount rate | 15.00% |
Employee share purchase maximum purchase amount | $ 25,000,000 |
Employee Share Purchase Plan 2021 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Maximum number of common shares allow for issuance | 200,000 |
Common Shares |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Employee share purchase (in shares) | 6,111 | 3,285

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