Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	$ 773,217	$ 696,142
Unearned net loan origination fees	(938)	(885)
Allowance for loan losses	(7,165)	(6,696)
Net loans receivable	765,114	688,561
Mortgage loans serviced for the benefit of others	244	249
Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	40,802	40,280
Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	41,213	25,360
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	526,054	479,227
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	164,181	150,237
Consumer And Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	$ 967	$ 1,038