Fair Value of Financial Instruments - Carrying and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financial Assets:
Securities available for sale	$ 280,503	$ 346,502	[1]
Level 1
Financial Assets:
Cash and cash equivalents	85,929	53,207
Securities available for sale	0	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
Junior subordinated debt	0	0
Accrued interest payable	0	0
Level 1 | Long-term borrowings
Financial Liabilities:
Borrowings	0	0
Level 1 | Other short-term borrowings
Financial Liabilities:
Borrowings		0
Level 2
Financial Assets:
Cash and cash equivalents	0	0
Securities available for sale	280,503	346,502
Restricted stock	5,501	6,224
Loans held for sale	2,379	5,996
Loans, net of allowance	0	0
Bank owned life insurance	18,381	18,163
Accrued interest receivable	4,820	5,083
Financial Liabilities:
Deposits	1,073,660	991,785
Repurchase agreements	48,282	39,166
Junior subordinated debt	0	0
Accrued interest payable	611	623
Level 2 | Long-term borrowings
Financial Liabilities:
Borrowings	0	0
Level 2 | Other short-term borrowings
Financial Liabilities:
Borrowings		20,000
Level 3
Financial Assets:
Cash and cash equivalents	0	0
Securities available for sale	0	0
Restricted stock	0	0
Loans held for sale	0	0
Loans, net of allowance	1,276,921	1,136,961
Bank owned life insurance	0	0
Accrued interest receivable	0	0
Financial Liabilities:
Deposits	385,502	374,774
Repurchase agreements	0	0
Junior subordinated debt	27,403	24,932
Accrued interest payable	0	0
Level 3 | Long-term borrowings
Financial Liabilities:
Borrowings	10,052	10,156
Level 3 | Other short-term borrowings
Financial Liabilities:
Borrowings		0
Carrying Value
Financial Assets:
Cash and cash equivalents	85,929	53,207
Securities available for sale	280,503	346,502
Restricted stock	5,501	6,224
Loans held for sale	2,379	5,996
Loans, net of allowance	1,275,061	1,152,020
Bank owned life insurance	18,381	18,163
Accrued interest receivable	4,820	5,083
Financial Liabilities:
Deposits	1,462,841	1,370,640
Repurchase agreements	48,282	39,166
Junior subordinated debt	27,775	27,724
Accrued interest payable	611	623
Carrying Value | Long-term borrowings
Financial Liabilities:
Borrowings	9,991	9,980
Carrying Value | Other short-term borrowings
Financial Liabilities:
Borrowings		20,000
Fair Value
Financial Assets:
Cash and cash equivalents	85,929	53,207
Securities available for sale	280,503	346,502
Restricted stock	5,501	6,224
Loans held for sale	2,379	5,996
Loans, net of allowance	1,276,921	1,136,961
Bank owned life insurance	18,381	18,163
Accrued interest receivable	4,820	5,083
Financial Liabilities:
Deposits	1,459,162	1,366,559
Repurchase agreements	48,282	39,166
Junior subordinated debt	27,403	24,932
Accrued interest payable	611	623
Fair Value | Long-term borrowings
Financial Liabilities:
Borrowings	$ 10,052	10,156
Fair Value | Other short-term borrowings
Financial Liabilities:
Borrowings		$ 20,000

[1] Derived from audited consolidated financial statements.