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STOCKHOLDERS' EQUITY - Narrative (Details) - $ / shares
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Equity [Abstract]      
Preferred stock authorized for issuance (in shares) 10,000,000    
Par value of preferred stock authorized for issuance (in dollars per share) $ 1.00    
Preferred stock outstanding (in shares) 0 0 0
Treasury shares (in shares) 16,347,713 16,120,462