Annual report pursuant to Section 13 and 15(d)

STOCK BASED AND DEFERRED COMPENSATION - Narrative (Details)

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STOCK BASED AND DEFERRED COMPENSATION - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended 108 Months Ended
Dec. 31, 2018
Dec. 31, 2016
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options granted (in shares)     0  
Stock options outstanding (in shares) 0 0 0 0
Total intrinsic value of options exercises   $ 0.2    
Employees [Member] | Non-vested stock awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period for non-vested stock awards and stock options 5 years      
Senior executive officers and non-employee directors [Member] | Non-vested stock and performance-based awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period for non-vested stock awards and stock options 3 years      
2006 Stock Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares of common stock authorized under stock compensation plan (in shares) 5,350,000   5,350,000  
Remaining shares available for grant (in shares) 688,623.46   688,623.46  
2018 Stock Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares of common stock authorized under stock compensation plan (in shares) 1,250,000   1,250,000  
Remaining shares available for grant (in shares) 1,240,917   1,240,917