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Share Incentive and Other Compensation - Employee Share Purchase Plan and Deferred Share Plan - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 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
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)	2,428	395

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Employee stock ownership plan allowable share purchase amount per annum maximum.

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Aggregate number of common shares reserved for future issuance.

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Discount rate from fair value on purchase date that participants pay for shares.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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