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STOCK-BASED EMPLOYEE COMPENSATION - Summary of Share-Based Compensation Activity (Details)
3 Months Ended
Mar. 31, 2020
$ / shares
shares
Restricted Stock Units (RSUs) [Member]  
Share-Based Awards - Shares  
Unvested (in shares) 256,745
Granted (in shares) 152,832
Vested (in shares) (109,595)
Forfeited (in shares) (5,971)
Unvested (in shares) 294,011
Share-Based Awards - Weighted Average Grant Date Fair Value  
Unvested (in dollars per share) | $ / shares $ 1,801
Granted (in dollars per share) | $ / shares 1,732
Vested (in dollars per share) | $ / shares 1,808
Forfeited (in dollars per share) | $ / shares 1,805
Unvested (in dollars per share) | $ / shares $ 1,762
Performance Shares [Member]  
Share-Based Awards - Shares  
Unvested (in shares) 216,083
Granted (in shares) 0
Vested (in shares) (80,266)
Performance share units adjustment (in shares) (58,427)
Forfeited (in shares) (2,989)
Unvested (in shares) 74,401
Share-Based Awards - Weighted Average Grant Date Fair Value  
Unvested (in dollars per share) | $ / shares $ 1,835
Vested (in dollars per share) | $ / shares 1,737
Performance share units adjustment (in dollars per share) | $ / shares 1,957
Forfeited (in dollars per share) | $ / shares 1,834
Unvested (in dollars per share) | $ / shares $ 1,841
Performance Shares [Member] | Performance Share Units 2019 Grants [Member] | Shares probably to be issued [Member]  
Share-Based Awards - Shares  
Unvested (in shares) 45,361
Performance Shares [Member] | Performance Share Units 2019 Grants [Member] | Shares not subject to achieve minimum performance threshold [Member]  
Share-Based Awards - Shares  
Unvested (in shares) 45,361
Performance Shares [Member] | Performance Share Units 2019 Grants [Member] | Maximum number of shares that could be issued [Member]  
Share-Based Awards - Shares  
Unvested (in shares) 117,558
Performance Shares [Member] | Performance Share Units 2018 Grants [Member] | Shares probably to be issued [Member]  
Share-Based Awards - Shares  
Unvested (in shares) 29,040
Performance Shares [Member] | Performance Share Units 2018 Grants [Member] | Shares not subject to achieve minimum performance threshold [Member]  
Share-Based Awards - Shares  
Unvested (in shares) 28,647
Performance Shares [Member] | Performance Share Units 2018 Grants [Member] | Maximum number of shares that could be issued [Member]  
Share-Based Awards - Shares  
Unvested (in shares) 79,914