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EARNINGS PER SHARE - Antidilutive Securities (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Earnings Per Share, Diluted, Other Disclosures [Abstract]      
Antidilutive shares excluded from calculation of earnings per share 123,624 54,446 124,498