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EMPLOYEE STOCK COMPENSATION - Nonvested Stock Option Activity (Details) - $ / shares
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Number of Shares      
Outstanding at beginning of year (in shares) 105,432 518,936 566,266
Granted (in shares) 0 0 320,000
Vested (in shares) (41,584) (174,833) (170,837)
Forfeited (in shares) 0 (238,671) (196,493)
Outstanding at end of year (in shares) 63,848 105,432 518,936
Weighted-Average Exercise Price per Share      
Outstanding at beginning of year (in dollars per share) $ 13.31 $ 15.04 $ 12.99
Granted (in dollars per share) 0.00 0.00 16.77
Vested (in dollars per share) 13.32 14.10 12.81
Forfeited (in dollars per share) 0.00 16.50 13.86
Outstanding at end of year (in dollars per share) $ 13.30 $ 13.31 $ 15.04