STOCK-BASED COMPENSATION - Three Year Vest Restricted Shares (Details) - Three-Year Vesting - Restricted Shares $ / shares in Units, $ in Millions		3 Months Ended
Mar. 31, 2021 USD ($) $ / shares shares	Mar. 31, 2021 USD ($) $ / shares shares
Stock-based compensation
Vesting per year (as a percent)		33.33%
Granted (in shares)		43,050
Shares
Outstanding (in shares)		38,479
Granted (in shares)		43,050
Vested (in shares)		(21,220)
Outstanding (in shares)	60,309	60,309
Weighted Average Fair Value
Outstanding (in dollars per share) \| $ / shares		$ 57.82
Granted (in dollars per share) \| $ / shares		35.47
Vested (in dollars per share) \| $ / shares		48.55
Outstanding (in dollars per share) \| $ / shares	$ 45.13	$ 45.13
Compensation cost
Unrecognized compensation cost \| $	$ 2.4	$ 2.4
Weighted average period of recognition of unrecognized compensation cost	2 years 3 months 18 days
Equity Award Agreements
Stock-based compensation
Number of shares Attributable To Equitable Adjustment		9,917

Represents the percentage of stock awards vesting each year.

No definition available.

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- Definition

Number of shares attributable to equitable adjustment included in the equity instruments other than options granted during period.

+ References

No definition available.

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- References

No definition available.

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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.

+ References

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-Publisher FASB
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- Definition

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

+ References

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- Definition

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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- Definition

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).

+ References

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- Definition

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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- Definition

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

+ References

No definition available.

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- Definition

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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-Publisher FASB
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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.

+ References

No definition available.

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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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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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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.

+ References

No definition available.

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