Fair Value Measurements - Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financial Assets:
Securities available for sale	$ 346,502	$ 340,349
Level 1
Financial Assets:
Cash and cash equivalents	53,207	95,337
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
Other borrowings		0
Junior subordinated debt	0	0
Accrued interest payable	0	0
Level 1 | Long-term borrowings
Financial Liabilities:
Borrowings	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	346,502	338,863
Restricted stock	6,224	5,312
Loans held for sale	5,996	3,266
Loans, net of allowance	0	0
Bank owned life insurance	18,163	17,658
Accrued interest receivable	5,083	4,116
Financial Liabilities:
Deposits	991,785	865,350
Repurchase agreements	39,166	40,611
Other borrowings		0
Junior subordinated debt	0	0
Accrued interest payable	623	655
Level 2 | Long-term borrowings
Financial Liabilities:
Borrowings	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	1,486
Restricted stock	0	0
Loans held for sale	0	0
Loans, net of allowance	1,136,961	994,808
Bank owned life insurance	0	0
Accrued interest receivable	0	0
Financial Liabilities:
Deposits	374,774	396,551
Repurchase agreements	0	0
Other borrowings		10,293
Junior subordinated debt	24,932	22,940
Accrued interest payable	0	0
Level 3 | Long-term borrowings
Financial Liabilities:
Borrowings	10,156
Level 3 | Other short-term borrowings
Financial Liabilities:
Borrowings	0
Carrying Value
Financial Assets:
Cash and cash equivalents	53,207	95,337
Securities available for sale	346,502	340,349
Restricted stock	6,224	5,312
Loans held for sale	5,996	3,266
Loans, net of allowance	1,152,020	992,924
Bank owned life insurance	18,163	17,658
Accrued interest receivable	5,083	4,116
Financial Liabilities:
Deposits	1,370,640	1,262,660
Repurchase agreements	39,166	40,611
Other borrowings		9,958
Junior subordinated debt	27,724	27,622
Accrued interest payable	623	655
Carrying Value | Long-term borrowings
Financial Liabilities:
Borrowings	9,980
Carrying Value | Other short-term borrowings
Financial Liabilities:
Borrowings	20,000
Fair Value Balance
Financial Assets:
Cash and cash equivalents	53,207	95,337
Securities available for sale	346,502	340,349
Restricted stock	6,224	5,312
Loans held for sale	5,996	3,266
Loans, net of allowance	1,136,961	994,808
Bank owned life insurance	18,163	17,658
Accrued interest receivable	5,083	4,116
Financial Liabilities:
Deposits	1,366,559	1,261,901
Repurchase agreements	39,166	40,611
Other borrowings		10,293
Junior subordinated debt	24,932	22,940
Accrued interest payable	623	$ 655
Fair Value Balance | Long-term borrowings
Financial Liabilities:
Borrowings	10,156
Fair Value Balance | Other short-term borrowings
Financial Liabilities:
Borrowings	$ 20,000