Fair Value of Financial Instruments - Carrying and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financial Assets:
Securities available for sale	$ 355,595	$ 344,716	[1]
Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Financial Assets:
Cash and cash equivalents	75,714	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	354,225	339,236
Restricted stock	5,329	4,367
Loans held for sale	2,720	616
Loans, net of allowance	0	0
Bank owned life insurance	17,376	15,193
Accrued interest receivable	4,562	4,534
Financial Liabilities:
Deposits	834,455	712,019
Repurchase agreements	50,123	53,480
Other borrowings	0	0
Trust preferred capital notes	0	0
Accrued interest payable	598	587
Significant Unobservable Inputs Level 3 [Member]
Financial Assets:
Cash and cash equivalents	0	0
Securities available for sale	1,370	1,313
Restricted stock	0	0
Loans held for sale	0	0
Loans, net of allowance	976,220	832,708
Bank owned life insurance	0	0
Accrued interest receivable	0	0
Financial Liabilities:
Deposits	400,782	365,310
Repurchase agreements	0	0
Other borrowings	40,425	10,432
Trust preferred capital notes	21,353	22,009
Accrued interest payable	0	0
Carrying Value [Member]
Financial Assets:
Cash and cash equivalents	75,714	67,303
Securities available for sale	355,595	344,716
Restricted stock	5,329	4,367
Loans held for sale	2,720	616
Loans, net of allowance	970,112	828,498
Bank owned life insurance	17,376	15,193
Accrued interest receivable	4,562	4,534
Financial Liabilities:
Deposits	1,234,018	1,075,837
Repurchase agreements	50,123	53,480
Other borrowings	9,947	9,935
Trust preferred capital notes	27,571	27,521
Accrued interest payable	598	587
Fair Value [Member]
Financial Assets:
Cash and cash equivalents	75,714	67,303
Securities available for sale	355,595	344,716
Restricted stock	5,329	4,367
Loans held for sale	2,720	616
Loans, net of allowance	976,220	832,708
Bank owned life insurance	17,376	15,193
Accrued interest receivable	4,562	4,534
Financial Liabilities:
Deposits	1,235,237	1,077,329
Repurchase agreements	50,123	53,480
Other borrowings	40,425	10,432
Trust preferred capital notes	21,353	22,009
Accrued interest payable	$ 598	$ 587

[1] Derived from audited consolidated financial statements.