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STOCK-BASED COMPENSATION (Tables)
 12 Months Ended
Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Restricted Stock Activity
Restricted Stock Activity:
Years Ended December 31,
2018
 
2017
 
2016
 
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 year
152,644

 
$
63.18

 
162,087

 
$
51.97

 
260,698

 
$
52.68

Granted (1)
50,217

 
84.09

 
93,285

 
76.70

 
80,529

 
58.81

Forfeited 
—

 
—

 
(16,000
)
 
36.98

 
(910
)
 
52.89

Vested 
(59,547
)
 
63.77

 
(86,728
)
 
61.62

 
(178,230
)
 
56.09

Unvested at end of year 
143,314

 
70.26

 
152,644

 
63.18

 
162,087

 
51.97


(1) Does not include the restricted shares that may be earned if the performance goals established in 2017 for long-term performance and in 2018 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 86,836.
Restricted Stock Non-vested Awards By Expected Vesting Period
Following is a vesting schedule of the total unvested shares as of December 31, 2018:
Unvested Shares Vesting Schedule
 
Number of Shares
2019
 
53,826

2020
 
50,650

2021
 
23,167

2022
 
13,186

2023
 
2,485

Total Unvested Shares                                                  
 
143,314