Period of time related to S&P 500 Index.

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- Definition

The qualified retirement eligibility age for grants awarded in and after 2017.

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No definition available.

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- Definition

The qualified retirement eligibility number of years of service for grants awarded in and after 2017.

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No definition available.

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- Definition

Share-based Compensation Arrangement By Share-based Payment Award, Original Units Granted, Percent

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Number of Shares of Common Stock of Which Instrument is Convertible

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Correlation with S&P500

+ References

No definition available.

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- Definition

Period of time related to volatility.

+ References

No definition available.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for 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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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- Definition

Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
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- Definition

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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(02)
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- Definition

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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- Definition

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

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-Name Accounting Standards Codification
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- Definition

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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No definition available.

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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(2)
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- Definition

Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement.

+ References

No definition available.

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STOCK-BASED COMPENSATION (Details) - USD ($) $ in Millions	1 Months Ended		12 Months Ended
STOCK-BASED COMPENSATION (Details) - USD ($) $ in Millions	May 31, 2022	Feb. 28, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Stock-based Compensation
Stock-based compensation expense			$ 30.7	$ 26.6	$ 21.7
Payments for the purchase of shares to satisfy the employee income tax withholdings			$ 8.9	$ 6.2	14.2
Restricted Stock Units
Stock-based Compensation
Number of shares of common stock of which unit is convertible (in shares)			1
Vesting period			3 years
Qualified retirement eligibility age for grants awarded in and after 2017			55 years
Qualified retirement eligibility number of years of service for grants awarded in and after 2017			10 years
Stock options
Stock-based Compensation
Total intrinsic value of stock options exercised					$ 0.9
RSAs and RSUs
Stock-based Compensation
Shares purchased to satisfy the employee income tax withholdings (in shares)			68,872
Payments for the purchase of shares to satisfy the employee income tax withholdings			$ 8.2
Vested (in shares)			201,457	166,598	272,258
PSUs
Stock-based Compensation
Number of shares of common stock of which unit is convertible (in shares)			1
Vesting period			3 years
Shares purchased to satisfy the employee income tax withholdings (in shares)			5,245
Payments for the purchase of shares to satisfy the employee income tax withholdings			$ 0.6
Vested (in shares)			16,834	29,468	48,053
Risk-free interest rate	2.88%	1.75%
Volatility time period	3 years	3 years
Expected volatility	32.80%	32.20%
Correlation to S&P 500 Index time period	3 years	3 years
Correlation with S&P index	0.52	0.51
Unrecognized compensation expense			$ 36.9
Unrecognized compensation expense, period for recognition			1 year 10 months 24 days
PSUs \| Minimum
Stock-based Compensation
Units ultimately expected to be awarded			0.00%
PSUs \| Maximum
Stock-based Compensation
Units ultimately expected to be awarded			200.00%
Restricted Stock
Stock-based Compensation
Vested (in shares)			183,573
Restricted Stock \| Director
Stock-based Compensation
Vesting period			1 year