STOCK-BASED COMPENSATION - Performance Share Awards - Peer Group Market Condition Vesting (Details) - Performance Shares - January 28, 2017 $ / shares in Units, $ in Millions	6 Months Ended
Jun. 30, 2022 USD ($) $ / shares shares
Stock-based compensation
Performance period	3 years
Shares
Nonvested (in shares) \| shares	78,118
Granted (in shares) \| shares	23,056
Vested (in shares) \| shares	(24,425)
Nonvested (in shares) \| shares	76,749
Weighted Average Fair Value
Nonvested (in dollars per share) \| $ / shares	$ 47.01
Granted (in dollars per share) \| $ / shares	62.27
Vested (in dollars per share) \| $ / shares	(50.27)
Nonvested (in dollars per share) \| $ / shares	$ 50.56
Compensation cost
Unrecognized compensation cost \| $	$ 2.1
Weighted average period of recognition of unrecognized compensation cost	2 years
Minimum
Stock-based compensation
Vesting percentage	0.00%
Maximum
Stock-based compensation
Vesting percentage	150.00%

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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 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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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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