Loans - Schedule of Loans and Acquired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 1,357,476	$ 1,336,125
Net deferred loan (fees) costs	720	463
Overdraft deposits	127	114
Outstanding principal balance and the carrying amount of loan acquired [Abstract]
Outstanding principal balance	63,619	79,523
Carrying amount	58,886	73,796
Outstanding principal balance and the carrying amount of loan acquired, impaired [Abstract]
Outstanding principal balance	24,500	27,876
Carrying amount	20,611	23,430
Changes in the accretable discount on acquired loans [Abstract]
Balance at January 1	4,890	6,103	$ 7,299
Accretion	(2,362)	(3,117)	(3,232)
Reclassification from nonaccretable difference	956	1,006	2,197
Other changes, net	1,149	898	(161)
Balance at December 31	4,633	4,890	$ 6,103
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	285,972	251,666
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	753,040	760,848
Commercial real estate | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	97,240	123,147
Commercial real estate | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	655,800	637,701
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	313,371	319,183
Residential real estate | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	209,438	209,326
Residential real estate | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	103,933	109,857
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 5,093	$ 4,428