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STOCK-BASED COMPENSATION - All Equity and Liability Classified Award Activity (Details) - shares
3 Months Ended
Jan. 20, 2021
Jan. 01, 2020
Mar. 31, 2021
Shares      
Outstanding (in shares)     196,330
Granted (in shares)     111,516
Vested / Exercised (in shares)     (82,262)
Expired (in shares)     (22,000)
Outstanding (in shares)     203,584
Peer Group Market Condition Vesting      
Shares      
Vested / Exercised (in shares)     (17,418)
Peer Group Market Condition Vesting | Performance Shares      
Shares      
Outstanding (in shares)     55,851
Granted (in shares)     48,134
Vested / Exercised (in shares) (17,418) (12,635) (17,418)
Outstanding (in shares)     86,567
Shares      
Number of shares Attributable To Equitable Adjustment     15,988
Stock Price Vesting | Restricted Shares      
Shares      
Outstanding (in shares)     22,000
Expired (in shares)     (22,000)
Three-Year Vesting | Restricted Shares      
Shares      
Outstanding (in shares)     38,479
Granted (in shares)     43,050
Vested / Exercised (in shares)     (21,220)
Outstanding (in shares)     60,309
Original 2010 Plan      
Shares      
Granted (in shares)     111,516
Number of shares Attributable To Equitable Adjustment     46,237
Original 2010 Plan | Stock Option Awards      
Shares      
Outstanding (in shares)     80,000
Granted (in shares)     20,332
Vested / Exercised Shares     (43,624)
Outstanding (in shares)     56,708