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Disclosures about Fair Value of Financial Instruments (Schedule of Commitments to Extend Credit, Standby Letters of Credit and Commercial Letters) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Commitments To Extend Credit [Member]    
Other Commitments [Line Items]    
Long-term Line of Credit $ 144,010 $ 87,013
Standby Letters Of Credit [Member]    
Other Commitments [Line Items]    
Long-term Line of Credit 11,368 14,347
Commercial Letters Of Credit [Member]    
Other Commitments [Line Items]    
Long-term Line of Credit $ 3,486 $ 3,246