EMPLOYEE BENEFIT PLANS - Narrative (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Number of shares reserved for issuance under ESPP (in shares)	475,000
Postemployment Retirement Benefits
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Contributions by employer	$ 124	$ 814
Maximum
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Discount from market price (as a percent)	15.00%

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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The shares or units in an ESOP trust that have been assigned to individual participant accounts based on a known formula. IRS rules require allocations to be nondiscriminatory generally based on compensation, length of service, or a combination of both. For any particular participant such shares or units may be vested, unvested, or partially vested.

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

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