Loans, Allowance for Credit Losses and Impaired Loans - Aging (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Past due financing receivables
Total Past Due	$ 7,430	$ 10,480
Current Balance	992,694	623,423
Total Financing Receivables	1,000,124	633,903
Recorded Investment >90 Days Past Due and Accruing	5	606
Non-accrual loans	4,541	9,148
Unamortized discounts on acquired loans	6,136	1,327
30-59 Days Past Due
Past due financing receivables
Total Past Due	2,587	3,203
Non-accrual loans	956
60-89 Days Past Due
Past due financing receivables
Total Past Due	2,047	2,158
Non-accrual loans	81
Greater than 90 Days Past Due
Past due financing receivables
Total Past Due	2,796	5,119
Non-accrual loans	2,600	4,500
Real Estate Mortgage | Construction and Land Development
Past due financing receivables
Total Past Due	601	587
Current Balance	84,669	73,065
Total Financing Receivables	85,270	73,652
Recorded Investment >90 Days Past Due and Accruing		338
Non-accrual loans	177	220
Real Estate Mortgage | Construction and Land Development | 30-59 Days Past Due
Past due financing receivables
Total Past Due	424	9
Real Estate Mortgage | Construction and Land Development | 60-89 Days Past Due
Past due financing receivables
Total Past Due		200
Real Estate Mortgage | Construction and Land Development | Greater than 90 Days Past Due
Past due financing receivables
Total Past Due	177	378
Real Estate Mortgage | Residential Real Estate
Past due financing receivables
Total Past Due	2,675	3,275
Current Balance	207,003	122,126
Total Financing Receivables	209,678	125,401
Non-accrual loans	1,620	4,440
Real Estate Mortgage | Residential Real Estate | 30-59 Days Past Due
Past due financing receivables
Total Past Due	1,296	1,277
Real Estate Mortgage | Residential Real Estate | 60-89 Days Past Due
Past due financing receivables
Total Past Due	677	383
Real Estate Mortgage | Residential Real Estate | Greater than 90 Days Past Due
Past due financing receivables
Total Past Due	702	1,615
Real Estate Mortgage | Nonresidential
Past due financing receivables
Total Past Due	2,602	5,160
Current Balance	545,389	347,410
Total Financing Receivables	547,991	352,570
Non-accrual loans	2,608	4,203
Real Estate Mortgage | Nonresidential | 30-59 Days Past Due
Past due financing receivables
Total Past Due	635	867
Real Estate Mortgage | Nonresidential | 60-89 Days Past Due
Past due financing receivables
Total Past Due	144	1,542
Real Estate Mortgage | Nonresidential | Greater than 90 Days Past Due
Past due financing receivables
Total Past Due	1,823	2,751
Real Estate Mortgage | Home Equity Loans
Past due financing receivables
Total Past Due		122
Current Balance	37,912	20,780
Total Financing Receivables	37,912	20,902
Non-accrual loans	5	107
Real Estate Mortgage | Home Equity Loans | 30-59 Days Past Due
Past due financing receivables
Total Past Due		15
Real Estate Mortgage | Home Equity Loans | Greater than 90 Days Past Due
Past due financing receivables
Total Past Due		107
Commercial
Past due financing receivables
Total Past Due	1,532	1,329
Current Balance	111,981	57,136
Total Financing Receivables	113,513	58,465
Recorded Investment >90 Days Past Due and Accruing		268
Non-accrual loans	131	178
Commercial | 30-59 Days Past Due
Past due financing receivables
Total Past Due	231	1,028
Commercial | 60-89 Days Past Due
Past due financing receivables
Total Past Due	1,207	33
Commercial | Greater than 90 Days Past Due
Past due financing receivables
Total Past Due	94	268
Consumer and Other
Past due financing receivables
Total Past Due	20	7
Current Balance	5,740	2,906
Total Financing Receivables	5,760	2,913
Recorded Investment >90 Days Past Due and Accruing	5
Consumer and Other | 30-59 Days Past Due
Past due financing receivables
Total Past Due	1	$ 7
Consumer and Other | 60-89 Days Past Due
Past due financing receivables
Total Past Due	$ 19