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STOCK-BASED COMPENSATION PLANS - Summary of restricted stock award activity (Details) - Restricted Stock [Member]
shares in Thousands
9 Months Ended
Sep. 30, 2019
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding at Beginning 76
Granted 45
Forfeited 0
Vested (21)
Outstanding At Ending 100