Fair Value of Financial Instruments - Carrying and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financial Assets:
Securities available for sale	$ 358,306	$ 344,716	[1]
Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Financial Assets:
Cash and cash equivalents	65,917	67,303
Securities available for sale	0	4,167
Restricted stock	0	0
Loans held for sale	0	0
Loans, net of allowance	0	0
Bank owned life insurance	0	0
Accrued interest receivable	0	0
Financial Liabilities:
Deposits	0	0
Repurchase agreements	0	0
Other borrowings	0	0
Trust preferred capital notes	0	0
Accrued interest payable	0	0
Significant Other Observable Inputs Level 2 [Member]
Financial Assets:
Cash and cash equivalents	0	0
Securities available for sale	357,009	339,236
Restricted stock	5,308	4,367
Loans held for sale	2,998	616
Loans, net of allowance	0	0
Bank owned life insurance	17,491	15,193
Accrued interest receivable	4,462	4,534
Financial Liabilities:
Deposits	826,198	712,020
Repurchase agreements	43,579	53,480
Other borrowings	0	0
Trust preferred capital notes	0	0
Accrued interest payable	642	587
Significant Unobservable Inputs Level 3 [Member]
Financial Assets:
Cash and cash equivalents	0	0
Securities available for sale	1,297	1,313
Restricted stock	0	0
Loans held for sale	0	0
Loans, net of allowance	976,432	832,708
Bank owned life insurance	0	0
Accrued interest receivable	0	0
Financial Liabilities:
Deposits	402,079	365,309
Repurchase agreements	0	0
Other borrowings	10,414	10,432
Trust preferred capital notes	22,475	22,009
Accrued interest payable	0	0
Carrying Value [Member]
Financial Assets:
Cash and cash equivalents	65,917	67,303
Securities available for sale	358,306	344,716
Restricted stock	5,308	4,367
Loans held for sale	2,998	616
Loans, net of allowance	968,373	828,498
Bank owned life insurance	17,491	15,193
Accrued interest receivable	4,462	4,534
Financial Liabilities:
Deposits	1,226,521	1,075,837
Repurchase agreements	43,579	53,480
Other borrowings	9,952	9,935
Trust preferred capital notes	27,597	27,521
Accrued interest payable	642	587
Fair Value [Member]
Financial Assets:
Cash and cash equivalents	65,917	67,303
Securities available for sale	358,306	344,716
Restricted stock	5,308	4,367
Loans held for sale	2,998	616
Loans, net of allowance	976,432	832,708
Bank owned life insurance	17,491	15,193
Accrued interest receivable	4,462	4,534
Financial Liabilities:
Deposits	1,228,277	1,077,329
Repurchase agreements	43,579	53,480
Other borrowings	10,414	10,432
Trust preferred capital notes	22,475	22,009
Accrued interest payable	$ 642	$ 587

[1] Derived from audited consolidated financial statements.