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SHORT-TERM BORROWINGS (Tables)
 12 Months Ended
Dec. 31, 2016
Debt Disclosure [Abstract]  
Summary of the Use of Short-Term Borrowings
The following table summarizes the use of these short-term borrowings at and for the years ended December 31.
 
(Dollars in thousands)
2016
 
2015
 
2014
 
 
 
 
 
 
Balance at year-end
$
52,000

 
$
60,000

 
$
65,000

Weighted average interest rate at year-end
0.76
%
 
0.53
%
 
0.36
%
Average balance during the year
$
17,841

 
$
55,106

 
$
32,736

Average interest rate during the year
0.61
%
 
0.43
%
 
0.34
%
Maximum month-end balance during the year
$
52,000

 
$
83,500

 
$
65,000
Summary of the Use of Securities Sold Under Agreements to Repurchase
The following table summarizes the use of securities sold under agreements to repurchase at and for the years ended December 31.
 
(Dollars in thousands)
2016
 
2015
 
2014
 
 
 
 
 
 
Balance at year-end
$
35,864

 
$
29,156

 
$
21,742

Weighted average interest rate at year-end
0.20
%
 
0.20
%
 
0.20
%
Average balance during the year
$
38,546

 
$
30,156

 
$
19,186

Average interest rate during the year
0.20
%
 
0.20
%
 
0.20
%
Maximum month-end balance during the year
$
52,693

 
$
37,558

 
$
32,861

Fair value of securities underlying the agreements at year-end
56,201

 
35,470

 
38,337