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EMPLOYEE BENEFIT PLANS - Additional information (Details) - Restricted Stock - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value (in dollars per share)	$ 15.00	$ 17.21	$ 13.97
Total fair value of shares vested	$ 4,431,000	$ 3,818,000	$ 4,289,000
Tax benefits for compensation expense for restricted stock	363,000	$ 517,000
Unrecognized compensation cost related to non-vested restricted shares	$ 6,970,000
Unrecognized compensation cost related to non-vested restricted shares recognized period	3 years 1 month 6 days

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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 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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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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