CAPITAL STOCK AND SHARE-BASED COMPENSATION - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, authorized (shares)	60,000,000	60,000,000
Common stock, par value (usd per share)	$ 0.001	$ 0.001
Preferred stock, authorized (shares)	5,000,000	5,000,000
Preferred stock, par value (usd per share)	$ 0.001	$ 0.001
Common stock, issued (shares)	37,891,186	37,674,868
Common stock, outstanding (shares)	32,518,278	32,509,969
Preferred stock, issued (shares)	0	0
Percentage of ownership in subsidiaries	50.00%
Equity-based awards, number of shares authorized (shares)	2,500,000
Equity-based awards, shares available for grant (shares)	1,700,000
Percentage of total combined voting power of the Company and subsidiaries	10.00%
Percentage of market value for purchases under Employee Stock Purchase Program (percent)	85.00%
Common stock available for issuance under Employee Stock Purchase Plan (shares)	1,264,302
Employee Stock Purchase Plan expense	$ 0.7	$ 0.7	$ 0.6
Options granted (shares)	33,656
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of equity-based awards	4 years
Common Stock Shares Authorized For Issuance To Employee Stock Purchase Plan	4,500,000
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of equity-based awards	12 months
Share-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of share of common stock (percent)	100.00%
Share Based Awards to More Than Ten Percent Owner [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of share of common stock (percent)	110.00%
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (shares)	33,656	40,788	43,249
Stock compensation expense	$ 1.7	$ 3.6	$ 4.3
Tax benefit from stock option exercise	0.4	1.0	27.9
Intrinsic value of options outstanding	0.7
Intrinsic value of options exerciseable	0.7
Intrinsic value of options exercised during the period	1.5	5.1	121.1
Unrecognized compensation expense	$ 2.0
Unrecognized compensation expense weighted-average period for recognitions (years)	1 year 9 months 18 days
Stock Option [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term of share-based award	ten years
Non-Vested Stock Units [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of equity-based awards	4 years
Non-Vested Stock Units [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of equity-based awards	1 year
Non-Vested Stock Units - Service-Based [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 12.1	$ 9.4	$ 7.5
Unrecognized compensation expense	$ 22.6
Unrecognized compensation expense weighted-average period for recognitions (years)	2 years 2 months 12 days
Non-vested stock granted, weighted average grant date fair value (usd per share)	$ 115.07	$ 234.42	$ 206.10
Non-Vested Stock Units - Service-Based and Performance-Based [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 2.2	$ 10.2	$ 13.5
Unrecognized compensation expense	$ 1.1
Unrecognized compensation expense weighted-average period for recognitions (years)	1 year 1 month 6 days
Non-vested stock granted, weighted average grant date fair value (usd per share)	$ 133.70	$ 262.67	$ 201.90
Performance-based award, target number of units to be received (shares)	71,349

Number of shares authorized for issuance to the Company's employee stock purchase plan

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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

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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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