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STOCK-BASED COMPENSATION (Tables)
12 Months Ended
Dec. 31, 2020
Share-based Payment Arrangement [Abstract]  
Restricted Stock Activity
Restricted Stock Activity:Years Ended December 31,
202020192018
 
Shares
Weighted Average
Grant Date
Fair Value
 
Shares
Weighted Average
Grant Date
Fair Value
 
Shares
Weighted Average
Grant Date
Fair Value
Unvested at beginning of year130,884 $82.78 143,314 $70.26 152,644 $63.18 
Granted (1)
69,446 101.19 59,943 94.62 50,217 84.09 
Forfeited (440)112.14 (3,010)86.19 — — 
Vested (86,765)73.80 (69,363)66.99 (59,547)63.77 
Unvested at end of year 113,125 100.86 130,884 82.78 143,314 70.26 

(1) Does not include the restricted shares that may be earned if the performance goals established in 2018 and 2019 for long-term performance and in 2020 for annual and long-term performance are achieved. Depending on the actual level of achievement of the goals at the end of the open performance periods, the number of shares earned could range from zero to 109,884.
Restricted Stock Non-vested Awards By Expected Vesting Period
Following is a vesting schedule of the total unvested shares as of December 31, 2020:
Unvested Shares Vesting ScheduleNumber of Shares
202144,807 
202231,870 
202322,089 
202411,899 
20252,460 
Total Unvested Shares                                                  
113,125