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Interest Rate Swaps (Tables)
 12 Months Ended
Dec. 31, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract]  
Summary Information about Interest-Rate Swaps

Summary information about these interest-rate swaps as of year ended December 31, 2017, 2016 and 2015 is as follows:

 

 

 

2017

 

 

2016

 

 

2015

 

Notional amounts

 

$

38,481

 

 

$

34,360

 

 

$

30,763

 

Weighted average pay rate on interest-rate swaps

 

 

4.46

%

 

 

4.34

%

 

 

4.25

%

Weighted average receive rate on interest-rate swaps

 

 

3.81

%

 

 

3.04

%

 

 

2.70

%

Weighted average maturity (years)

 

 

3.2

 

 

 

4.8

 

 

 

4.1

 

Fair value of interest-rate swaps

 

$

(653

)

 

$

(685

)

 

$

(789

)

Fair value of loan yield maintenance provisions

 

$

653

 

 

$

685

 

 

$

789