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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Fair value of share-based awards granted.

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Number of common stock issued during the period upon the issuance of restricted common shares.

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Equity-Based Compensation - Restricted common units - Other (Details) $ in Millions		12 Months Ended
	Feb. 28, 2020 employee installment shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Share-Based Compensation Arrangement by Share-Based Payment Award
Stock based compensation expenses \| $		$ 0.6	$ 0.5	$ 0.4
Restricted common units
Share-Based Compensation Arrangement by Share-Based Payment Award
Units granted (in shares)		1,145,000
Units outstanding		1,127,000
Granted Fair Value \| $		$ 13.1
Stock based compensation expenses \| $		$ 1.7
Period to recognized compensation cost		3 years
Units outstanding, intrinsic value \| $		$ 15.1
Shares available for issuance		3,400,000
Restricted Awards
Share-Based Compensation Arrangement by Share-Based Payment Award
Vested		475,032
Units outstanding		475,032
Common shares issued upon vesting of restricted common shares		330,000
Volatility rate	40.00%
Risk free interest rate	1.14%
Discount rate	30.00%
Stock based compensation expenses \| $		$ 0.3	$ 0.8	$ 1.2
Compensation cost not yet recognized \| $		$ 0.1
Restricted Awards \| Executive employee
Share-Based Compensation Arrangement by Share-Based Payment Award
Number of executive \| employee	3
Number of shares issued for each unit	0.1049203474320
Number of installments \| installment	3
Vesting period	3 years