Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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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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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Percentage of vesting of award under share-based payment arrangement.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The number of service areas sold during the period.

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Stock-Based Compensation - Performance Shares (Details) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended	12 Months Ended
	Mar. 03, 2022 $ / shares shares	Feb. 28, 2022	Dec. 31, 2021 USD ($)	Dec. 31, 2021 item
Fair value assumptions
Number of service areas sold \| item				5
Performance shares
Stock Based Compensation
Granted (in shares) \| shares	199,592
Fair value assumptions
Amount reversed of previously recognized stock compensation expense \| $			$ 1.0
Performance shares \| Share-based Payment Arrangement, Tranche One, TSR
Stock Based Compensation
Vesting (as a percent)	50.00%
Grant date fair value (in dollars per share) \| $ / shares	$ 24.71
Fair value assumptions
Risk-free interest rate (as a percent)	1.66%
Expected volatility (as a percent)	58.47%
Expected life	3 years
Performance shares \| Share-based Payment Arrangement, Tranche Two, EBITDA metric
Stock Based Compensation
Vesting (as a percent)	50.00%
Vesting period	3 years
Performance shares \| Share-based Payment Arrangement, Tranche Two, EBITDA metric \| Award date, 2020 and 2021
Stock Based Compensation
Vesting period		3 years	3 years
Performance shares \| Minimum
Stock Based Compensation
Vesting (as a percent)	50.00%
Performance shares \| Maximum
Stock Based Compensation
Vesting (as a percent)	200.00%