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STOCK COMPENSATION (Tables)
 3 Months Ended
Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Status of RSUs
A summary of the RSUs outstanding as of March 31, 2019, and 2018, and changes during the three months ended March 31, 2019 and 2018, follows:
 
2019
 
2018
 
Shares
 
Weighted-Average Grant Date
Fair Value
 
Shares
 
Weighted-Average Grant Date
Fair Value
Outstanding at January 1,
266,995

 
$
43.89

 
301,578

 
$
34.74

Granted
125,966

 
45.77

 
87,249

 
55.25

Vested
(117,122
)
 
35.84

 
(107,553
)
 
30.79

Forfeited
(13,364
)
 
49.89

 
(19,113
)
 
43.62

Outstanding at March 31,
262,475

 
$
48.07

 
262,161

 
$
42.60