Disclosures About Fair Value of Assets and Liabilities, Financial Instruments not Recorded at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Carrying Amount [Member]
Financial Assets [Abstract]
Cash and due from banks	$ 127,780	$ 117,128
Interest-bearing time deposits in other banks	27,865	30,147
Loans, net of allowance	828,065	699,458
Mortgage loans held for sale	500	1,031
Nonmarketable equity securities	1,095	1,100
Interest receivable	5,267	3,954
Financial Liabilities [Abstract]
Deposits	894,231	757,483
Interest payable	423	636
Fair Value [Member]
Financial Assets [Abstract]
Cash and due from banks	127,780	117,128
Interest-bearing time deposits in other banks	27,865	30,147
Loans, net of allowance	828,550	700,481
Mortgage loans held for sale	500	1,031
Nonmarketable equity securities	1,095	1,100
Interest receivable	5,267	3,954
Financial Liabilities [Abstract]
Deposits	892,882	757,520
Interest payable	423	636
Fair Value [Member] | Level 1 [Member]
Financial Assets [Abstract]
Cash and due from banks	127,780	117,128
Interest-bearing time deposits in other banks	0	0
Loans, net of allowance	0	0
Mortgage loans held for sale	0	0
Nonmarketable equity securities	0	0
Interest receivable	0	0
Financial Liabilities [Abstract]
Deposits	0	0
Interest payable	0	0
Fair Value [Member] | Level 2 [Member]
Financial Assets [Abstract]
Cash and due from banks	0	0
Interest-bearing time deposits in other banks	27,865	30,147
Loans, net of allowance	823,896	698,672
Mortgage loans held for sale	500	1,031
Nonmarketable equity securities	1,095	1,100
Interest receivable	5,267	3,954
Financial Liabilities [Abstract]
Deposits	892,882	757,520
Interest payable	423	636
Fair Value [Member] | Level 3 [Member]
Financial Assets [Abstract]
Cash and due from banks	0	0
Interest-bearing time deposits in other banks	0	0
Loans, net of allowance	4,654	1,809
Mortgage loans held for sale	0	0
Nonmarketable equity securities	0	0
Interest receivable	0	0
Financial Liabilities [Abstract]
Deposits	0	0
Interest payable	$ 0	$ 0