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EARNINGS PER COMMON SHARE - Narrative (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Restricted Stock Units        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive securities not included in computation of diluted earnings per share (in shares) 0 0 430 20,500
Employee Stock Option        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive securities not included in computation of diluted earnings per share (in shares)   0   0
Stock options outstanding (in shares) 0   0