Loans and the Allowance for Loan Losses (Risk Portfolio Based on Payment Activity) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Loans and the Allowance for Loan Losses [Line Items]
Total loans	$ 1,978,909	$ 1,049,698
Performing [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	1,974,283	1,042,776
Non-Performing [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	4,626	6,922
Commercial real estate - owner occupied [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	467,082	250,440
Commercial real estate - owner occupied [Member] | Performing [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	466,016	250,440
Commercial real estate - owner occupied [Member] | Non-Performing [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	1,066	0
Commercial real estate - non-owner occupied [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	436,083	184,688
Commercial real estate - non-owner occupied [Member] | Performing [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	436,083	184,688
Commercial real estate - non-owner occupied [Member] | Non-Performing [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	0	0
Residential Real Estate [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	489,669	204,413
Residential Real Estate [Member] | Performing [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	489,669	203,982
Residential Real Estate [Member] | Non-Performing [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	0	431
Commercial [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	463,652	311,486
Commercial [Member] | Performing [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	461,139	305,935
Commercial [Member] | Non-Performing [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	2,513	5,551
Real estate construction [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	97,481	91,822
Real estate construction [Member] | Performing [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	96,616	90,882
Real estate construction [Member] | Non-Performing [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	865	940
Consumer [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	24,942	6,849
Consumer [Member] | Performing [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	24,760	6,849
Consumer [Member] | Non-Performing [Member]
Loans and the Allowance for Loan Losses [Line Items]
Total loans	$ 182	$ 0