Fair Value of Financial Instruments - Carrying and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Financial Assets:
Securities available for sale	$ 362,800	$ 340,349	[1]
Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Financial Assets:
Cash and cash equivalents	73,341	95,337
Securities available for sale		0
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
Junior subordinated debt	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	362,477	338,863
Restricted stock	5,362	5,312
Loans held for sale	4,692	3,266
Loans, net of allowance	0	0
Bank owned life insurance	17,885	17,658
Accrued interest receivable	4,974	4,116
Financial Liabilities:
Deposits	895,047	865,350
Repurchase agreements	53,369	40,611
Other borrowings	0	0
Junior subordinated debt	0	0
Accrued interest payable	668	655
Significant Unobservable Inputs Level 3 [Member]
Financial Assets:
Cash and cash equivalents	0	0
Securities available for sale	0	1,486
Restricted stock	0	0
Loans held for sale	0	0
Loans, net of allowance	1,048,001	994,808
Bank owned life insurance	0	0
Accrued interest receivable	0	0
Financial Liabilities:
Deposits	405,688	396,551
Repurchase agreements	0	0
Other borrowings	10,285	10,293
Junior subordinated debt	26,856	22,940
Accrued interest payable	0	0
Carrying Value [Member]
Financial Assets:
Cash and cash equivalents	73,341	95,337
Securities available for sale	362,800	340,349
Restricted stock	5,362	5,312
Loans held for sale	4,692	3,266
Loans, net of allowance	1,045,285	992,924
Bank owned life insurance	17,885	17,658
Accrued interest receivable	4,974	4,116
Financial Liabilities:
Deposits	1,298,385	1,262,660
Repurchase agreements	53,369	40,611
Other borrowings	9,969	9,958
Junior subordinated debt	27,673	27,622
Accrued interest payable	668	655
Fair Value [Member]
Financial Assets:
Cash and cash equivalents	73,341	95,337
Securities available for sale	362,477	340,349
Restricted stock	5,362	5,312
Loans held for sale	4,692	3,266
Loans, net of allowance	1,048,001	994,808
Bank owned life insurance	17,885	17,658
Accrued interest receivable	4,974	4,116
Financial Liabilities:
Deposits	1,300,735	1,261,901
Repurchase agreements	53,369	40,611
Other borrowings	10,285	10,293
Junior subordinated debt	26,856	22,940
Accrued interest payable	$ 668	$ 655

[1] Derived from audited consolidated financial statements.