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SUMMARY OF NONVESTED PHANTOM STOCK UNITS (Details)
9 Months Ended
Sep. 30, 2020
$ / shares
shares
Share-based Payment Arrangement [Abstract]  
Nonvested Units, Beginning balance 15,493
Nonvested Weighted Average Grant Date Fair Value, Beginning balance | $ / shares $ 59.65
Nonvested Units, Granted 5,745
Nonvested Weighted Average Grant Date Fair Value, Granted | $ / shares $ 83.56
Nonvested Units, Vested (7,986)
Nonvested Weighted Average Grant Date Fair Value, Vested | $ / shares $ 55.35
Nonvested Units, Forfeited
Nonvested Weighted Average Grant Date Fair Value, Forfeited | $ / shares
Nonvested Units, Canceled
Nonvested Weighted Average Grant Date Fair Value, Canceled
Nonvested Units, Ending Balance 13,252
Nonvested Weighted Average Grant Date Fair Value, Ending Balance | $ / shares $ 72.61
Phantom Stock Unit Awards Expected to Vest, Units 13,252
Phantom Stock Unit Awards Expected to Vest, Weighted Average Grant Date Fair Value 72.61