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Concentrations of Credit Risk	12 Months Ended
Concentrations of Credit Risk	Dec. 31, 2016
Risks and Uncertainties [Abstract]
Concentrations of Credit Risk	Concentrations of Credit Risk Substantially all the Company's loans are made within its market area, which includes Southern and Central Virginia and the northern portion of Central North Carolina. The ultimate collectibility of the Company's loan portfolio and the ability to realize the value of any underlying collateral, if necessary, are impacted by the economic conditions and real estate values of the market area. Loans secured by real estate were $951,073,000, or 81.6% of the loan portfolio at December 31, 2016, and $822,037,000, or 81.8% of the loan portfolio at December 31, 2015. Loans secured by commercial real estate represented the largest portion of loans at $510,960,000 at December 31, 2016 and $430,186,000 at December 31, 2015, 43.9% and 42.8%, respectively of total loans. While there were no concentrations of loans to any individual, group of individuals, business, or industry that exceeded 10% of total loans at December 31, 2016 or 2015, nonowner-occupied nonresidential loans represented 20.2% of total loans at December 31, 2016 and 18.7% at December 31, 2015; the lessees and lessors are engaged in a variety of industries.