Loans and Allowance for Loan Losses (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 813,376,000	$ 727,715,000
Less: Allowance for loan losses	(5,105,000)	(4,354,000)	$ (3,880,000)
Loans, net	808,271,003	723,360,786
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	415,208,000	369,777,000
Less: Allowance for loan losses	(2,369,000)	(1,906,000)	(1,734,000)
Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	187,802,000	161,694,000
Less: Allowance for loan losses	(1,382,000)	(1,015,000)	(906,000)
Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	117,869,000	105,478,000
Less: Allowance for loan losses	(717,000)	(627,000)	(690,000)
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	85,022,000	84,951,000
Less: Allowance for loan losses	(520,000)	(777,000)	(524,000)
Consumer and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	7,475,000	5,815,000
Less: Allowance for loan losses	(117,000)	(29,000)	$ (26,000)
Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	27,193,000	38,277,000
Less: Allowance for loan losses	0	0
Loans, net	27,193,000	38,277,000
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	14,943,000	20,050,000
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	9,004,000	12,764,000
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,678,000	2,695,000
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,568,000	2,768,000
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0	0
All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	786,183,000	689,438,000
Less: Allowance for loan losses	(5,105,000)	(4,354,000)
Loans, net	781,078,000	685,084,000
All Other Loans [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	400,265,000	349,727,000
All Other Loans [Member] | Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	178,798,000	148,930,000
All Other Loans [Member] | Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	116,191,000	102,783,000
All Other Loans [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	83,454,000	82,183,000
All Other Loans [Member] | Consumer and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 7,475,000	$ 5,815,000