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EARNINGS PER SHARE (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2020
Mar. 31, 2020
Mar. 27, 2020
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Antidilutive securities excluded from computation of diluted earnings per share              
Sale of stock, number of shares issued in transaction (in shares) 12,270,900   2,000,000        
Common stock, par value (in dollars per share)     $ 50.00        
Sale of stock, consideration received on transaction   $ 593.7          
Employees Directors and Consultants Stock Options              
Antidilutive securities excluded from computation of diluted earnings per share              
Antidilutive securities excluded from computation of diluted earnings per share (in shares)       513,750 569,408 386,522  
Restricted Stock              
Antidilutive securities excluded from computation of diluted earnings per share              
Antidilutive securities excluded from computation of diluted earnings per share (in shares)       262,369 278,379 262,369 278,379
Over-Allotment Option              
Antidilutive securities excluded from computation of diluted earnings per share              
Sale of stock, number of shares issued in transaction (in shares)     300,000        
Additional Over-Allotment Option              
Antidilutive securities excluded from computation of diluted earnings per share              
Sale of stock, number of shares issued in transaction (in shares)     270,900        
Private Placement              
Antidilutive securities excluded from computation of diluted earnings per share              
Sale of stock, number of shares issued in transaction (in shares)     10,000,000        
Common stock, par value (in dollars per share)     $ 50.00