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Share-based Compensation Arrangement by Share-based Payment Award, Awards Vesting Target Percentage

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Intrinsic value of outstanding award under share-based payment arrangement. Excludes share and unit options.

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Share-Based Compensation - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) tranche age shares	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Apr. 27, 2021 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Capital shares reserved for future issuance \| shares				1,280,000
Compensation expense \| $	$ 4.1	$ 6.8	$ 6.0
Number of tranches \| tranche	3
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Retirement age \| age	65
Anticipated additional compensation costs to be recognized in future periods \| $	$ 3.1
Weighted average period over which additional compensation cost will be expensed	1 year 8 months 12 days
Vested in period (in shares) \| shares	110,000
Restricted Stock Units (RSUs) \| Non-Employee Directors Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Anticipated additional compensation costs to be recognized in future periods \| $	$ 2.4
Weighted average period over which additional compensation cost will be expensed	1 year 10 months 24 days
Vested in period (in shares) \| shares	47,000
Performance Shares \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting target percentage	0.00%
Performance Shares \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting target percentage	200.00%
Performance Shares \| Share-based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Performance Shares \| Share-based Payment Arrangement, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	2 years
Performance Shares \| Share-based Payment Arrangement, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Deferred Share Units \| Non-Employee Directors Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding awards (in shares) \| shares	26,029
Outstanding awards, fair value \| $	$ 1.0
Deferred Share Units \| 2021 Plan and the 2011 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding awards (in shares) \| shares	8,234
Outstanding awards, fair value \| $	$ 0.3