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Off-Balance-Sheet Activities (Tables)
12 Months Ended
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]  
Notional amount of financial instrument
The following table summarizes our credit related financial instruments with off-balance-sheet risk as of December 31:

2018
 
2017
Unfunded commitments under lines of credit
$
199,652

 
$
184,317

Commercial and standby letters of credit
1,723

 
1,622

Commitments to grant loans
13,225

 
24,782

Total
$
214,600

 
$
210,721