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STOCK-BASED COMPENSATION (Stock Options Activity) (Details) - Stock options
12 Months Ended
Dec. 31, 2020
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Roll Forward]  
Options outstanding at January 1, number of options outstanding | shares 5,000
Expired/forfeited, number of options outstanding | shares (5,000)
Options outstanding at December 31, number of options outstanding | shares 0
Options exercisable at December 31, number of options outstanding | shares 0
Share-based Compensation Arrangement by Share-based Payment Award, Outstanding, Weighted Average Exercise Price [Roll Forward]  
Options outstanding at January 1, weighted average exercise price per share | $ / shares $ 24.90
Expired/forfeited, weighted average exercise price per share | $ / shares (24.90)
Options outstanding at December 31, weighted average exercise price per share | $ / shares 0
Options exercisable at December 31, weighted average exercise price per share | $ / shares $ 0