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SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE (Tables)
 12 Months Ended
Dec. 31, 2017
SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE [Abstract]  
Securities Sold under Agreements to Repurchase
Information concerning securities sold under agreements to repurchase is summarized as follows:

  
2017
  
2016
 
Year-end balance
 
$
23,310
  
$
23,820
 
Average balance during the year
 
$
22,845
  
$
24,573
 
Average interest rate during the year
  
0.13
%
  
0.14
%
Maximum month-end balance during the year
 
$
25,116
  
$
33,956
 
Weighted average interest rate at year-end
  
0.13
%
  
0.09
%