Loans, Allowance for Credit Losses and Impaired Loans - Loan by Risk Rating (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) item	Dec. 31, 2018 USD ($) item
Loans by risk rating
Loans and leases receivable, gross	$ 993,988	$ 632,576
Non-Accrual	4,541	9,148
Troubled debt restructures	$ 10,295	$ 17,816
Number of TDR accounts | item	33	52
Performing
Loans by risk rating
Troubled debt restructures	$ 8,427	$ 11,134
Non-performing
Loans by risk rating
Troubled debt restructures	$ 1,868	$ 6,682
Number of TDR accounts | item	7	23
TDRS on Non-accrual	$ 1,868	$ 6,012
Past Due 30-89 | Non-performing
Loans by risk rating
Troubled debt restructures		671
Excellent
Loans by risk rating
Loans and leases receivable, gross	6,605	10,899
Superior
Loans by risk rating
Loans and leases receivable, gross	5,732	9,805
Good
Loans by risk rating
Loans and leases receivable, gross	953,295	581,295
Fair
Loans by risk rating
Loans and leases receivable, gross	13,634	14,788
Marginal
Loans by risk rating
Loans and leases receivable, gross	511	787
Substandard
Loans by risk rating
Loans and leases receivable, gross	14,211	15,003
Real Estate Mortgage | Construction and Land Development
Loans by risk rating
Loans and leases receivable, gross	84,751	73,652
Non-Accrual	177	220
Troubled debt restructures		$ 40
Number of TDR accounts | item		1
Real Estate Mortgage | Construction and Land Development | Non-performing
Loans by risk rating
Troubled debt restructures		$ 40
Number of TDR accounts | item		1
TDRS on Non-accrual		$ 40
Real Estate Mortgage | Construction and Land Development | Good
Loans by risk rating
Loans and leases receivable, gross	83,773	73,069
Real Estate Mortgage | Construction and Land Development | Fair
Loans by risk rating
Loans and leases receivable, gross	757	25
Real Estate Mortgage | Construction and Land Development | Marginal
Loans by risk rating
Loans and leases receivable, gross		338
Real Estate Mortgage | Construction and Land Development | Substandard
Loans by risk rating
Loans and leases receivable, gross	221	220
Real Estate Mortgage | Residential Real Estate
Loans by risk rating
Loans and leases receivable, gross	209,286	125,185
Non-Accrual	1,620	4,440
Troubled debt restructures	$ 2,323	$ 7,162
Number of TDR accounts | item	12	20
Real Estate Mortgage | Residential Real Estate | Performing
Loans by risk rating
Troubled debt restructures	$ 1,419	$ 3,979
Real Estate Mortgage | Residential Real Estate | Non-performing
Loans by risk rating
Troubled debt restructures	$ 904	$ 3,183
Number of TDR accounts | item	3	9
TDRS on Non-accrual	$ 904	$ 3,183
Real Estate Mortgage | Residential Real Estate | Superior
Loans by risk rating
Loans and leases receivable, gross	139	156
Real Estate Mortgage | Residential Real Estate | Good
Loans by risk rating
Loans and leases receivable, gross	200,999	113,777
Real Estate Mortgage | Residential Real Estate | Fair
Loans by risk rating
Loans and leases receivable, gross	3,373	3,658
Real Estate Mortgage | Residential Real Estate | Marginal
Loans by risk rating
Loans and leases receivable, gross	511	112
Real Estate Mortgage | Residential Real Estate | Substandard
Loans by risk rating
Loans and leases receivable, gross	4,264	7,482
Real Estate Mortgage | Nonresidential
Loans by risk rating
Loans and leases receivable, gross	544,551	351,823
Non-Accrual	2,608	4,203
Troubled debt restructures	$ 7,934	$ 10,301
Number of TDR accounts | item	20	27
Real Estate Mortgage | Nonresidential | Performing
Loans by risk rating
Troubled debt restructures	$ 7,008	$ 7,155
Real Estate Mortgage | Nonresidential | Non-performing
Loans by risk rating
Troubled debt restructures	$ 926	$ 3,146
Number of TDR accounts | item	3	9
TDRS on Non-accrual	$ 926	$ 2,506
Real Estate Mortgage | Nonresidential | Past Due 30-89 | Non-performing
Loans by risk rating
Troubled debt restructures		640
Real Estate Mortgage | Nonresidential | Excellent
Loans by risk rating
Loans and leases receivable, gross	405	1,143
Real Estate Mortgage | Nonresidential | Superior
Loans by risk rating
Loans and leases receivable, gross	3,652	7,523
Real Estate Mortgage | Nonresidential | Good
Loans by risk rating
Loans and leases receivable, gross	525,465	328,178
Real Estate Mortgage | Nonresidential | Fair
Loans by risk rating
Loans and leases receivable, gross	7,710	8,059
Real Estate Mortgage | Nonresidential | Marginal
Loans by risk rating
Loans and leases receivable, gross		69
Real Estate Mortgage | Nonresidential | Substandard
Loans by risk rating
Loans and leases receivable, gross	7,319	6,851
Real Estate Mortgage | Home Equity Loans
Loans by risk rating
Loans and leases receivable, gross	37,714	20,782
Non-Accrual	5	107
Troubled debt restructures		$ 107
Number of TDR accounts | item		1
Real Estate Mortgage | Home Equity Loans | Non-performing
Loans by risk rating
Troubled debt restructures		$ 107
Number of TDR accounts | item		1
TDRS on Non-accrual		$ 107
Real Estate Mortgage | Home Equity Loans | Superior
Loans by risk rating
Loans and leases receivable, gross	122	110
Real Estate Mortgage | Home Equity Loans | Good
Loans by risk rating
Loans and leases receivable, gross	37,528	19,624
Real Estate Mortgage | Home Equity Loans | Fair
Loans by risk rating
Loans and leases receivable, gross	64	941
Real Estate Mortgage | Home Equity Loans | Substandard
Loans by risk rating
Loans and leases receivable, gross		107
Commercial
Loans by risk rating
Loans and leases receivable, gross	111,997	58,222
Non-Accrual	131	178
Troubled debt restructures	$ 38
Number of TDR accounts | item	1
Commercial | Non-performing
Loans by risk rating
Troubled debt restructures	$ 38
Number of TDR accounts | item	1
TDRS on Non-accrual	$ 38
Commercial | Excellent
Loans by risk rating
Loans and leases receivable, gross	6,089	9,631
Commercial | Superior
Loans by risk rating
Loans and leases receivable, gross	1,818	2,011
Commercial | Good
Loans by risk rating
Loans and leases receivable, gross	99,973	43,863
Commercial | Fair
Loans by risk rating
Loans and leases receivable, gross	1,710	2,106
Commercial | Marginal
Loans by risk rating
Loans and leases receivable, gross		268
Commercial | Substandard
Loans by risk rating
Loans and leases receivable, gross	2,407	343
Consumer and Other
Loans by risk rating
Loans and leases receivable, gross	5,689	2,914
Troubled debt restructures		$ 206
Number of TDR accounts | item		3
Consumer and Other | Non-performing
Loans by risk rating
Troubled debt restructures		$ 206
Number of TDR accounts | item		3
TDRS on Non-accrual		$ 175
Consumer and Other | Past Due 30-89 | Non-performing
Loans by risk rating
Troubled debt restructures		31
Consumer and Other | Excellent
Loans by risk rating
Loans and leases receivable, gross	111	125
Consumer and Other | Superior
Loans by risk rating
Loans and leases receivable, gross	1	4
Consumer and Other | Good
Loans by risk rating
Loans and leases receivable, gross	5,557	$ 2,785
Consumer and Other | Fair
Loans by risk rating
Loans and leases receivable, gross	$ 20