SHAREHOLDERS EQUITY - Stock based compensation - Share Awards (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Stock issued (in shares)	8,225	6,127
Stock surrendered (in shares)	4,289	2,824
Stock surrendered to cover employee withholding taxes	$ 0.1	$ 0.1
Time Vesting Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of year	249,821
Vested (in shares)	(414)
Forfeited (in shares)	(1,967)
Outstanding at end of year	247,440
Stock-based compensation expense		$ 0.4
Unrecognized compensation expense	$ 3.0
Unrecognized compensation expense recognition period (in years)	1 year 4 months 24 days
Financial Performance Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of year	183,483
Vested (in shares)	(12,100)
Forfeited (in shares)	(671)
Outstanding at end of year	170,712
Market Performance Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of year	13,746
Outstanding at end of year	13,746
Unrecognized compensation expense recognition period (in years)	1 year

The stock surrendered during the period.

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The value stock surrendered during the period.

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

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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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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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

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Number of shares issued during the period to an employee benefit plan, such as a defined contribution or defined benefit plan.

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