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SHARE-BASED COMPENSATION PLANS - Schedule of Employee Stock Purchase Plan (Details) - Employee Stock Purchase Plan - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items] |  |  |  |
Shares purchased (in shares) | 3,271 | 4,218 | 8,755 | 7,831
Weighted average price of shares purchased (in usd per share) | $ 19.16 | $ 13.08 | $ 15.58 | $ 14.85
Compensation expense recognized | $ 15 | $ 3 | $ 48 | $ 6

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