Fair Value of Assets and Liabilities - Financial Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Securities available for sale
Securities available for sale	$ 205,232,000	$ 219,476,000
Interest rate lock commitments
Securities available for sale
Derivative asset	1,250,000
Interest Rate Swap \| Cash Flow Hedges
Securities available for sale
Derivative asset	815,000
Liabilities:
Derivative liabilities	815,000
Recurring
Securities available for sale
Securities available for sale	205,232,000	219,476,000
Loans held for sale	66,689,000	44,000,000
Total assets measured at fair value	273,987,000	264,220,000
Recurring \| Cash Flow Hedges
Liabilities:
Derivative liabilities	603,000
Recurring \| Interest rate lock commitments
Securities available for sale
Derivative asset	1,251,000	744,000
Recurring \| Interest Rate Swap
Securities available for sale
Derivative asset	815,000
Liabilities:
Derivative liabilities	815,000
Recurring \| Interest Rate Swap \| Cash Flow Hedges
Liabilities:
Derivative liabilities	1,418,000	175,000
Level 2 \| Recurring
Securities available for sale
Securities available for sale	205,232,000	219,476,000
Loans held for sale	66,689,000	44,000,000
Total assets measured at fair value	273,987,000	264,220,000
Level 2 \| Recurring \| Cash Flow Hedges
Liabilities:
Derivative liabilities	603,000
Level 2 \| Recurring \| Interest rate lock commitments
Securities available for sale
Derivative asset	1,251,000	744,000
Level 2 \| Recurring \| Interest Rate Swap
Securities available for sale
Derivative asset	815,000
Liabilities:
Derivative liabilities	815,000
Level 2 \| Recurring \| Interest Rate Swap \| Cash Flow Hedges
Liabilities:
Derivative liabilities	1,418,000	175,000
U.S. government agencies and corporations
Securities available for sale
Securities available for sale	14,052,000	18,501,000
U.S. government agencies and corporations \| Recurring
Securities available for sale
Securities available for sale	14,052,000	18,501,000
U.S. government agencies and corporations \| Level 2 \| Recurring
Securities available for sale
Securities available for sale	14,052,000	18,501,000
Mortgage-backed securities
Securities available for sale
Securities available for sale	70,360,000	77,027,000
Mortgage-backed securities \| Recurring
Securities available for sale
Securities available for sale	70,360,000	77,027,000
Mortgage-backed securities \| Level 2 \| Recurring
Securities available for sale
Securities available for sale	70,360,000	77,027,000
Obligations of states and political subdivisions
Securities available for sale
Securities available for sale	120,820,000	123,948,000
Obligations of states and political subdivisions \| Recurring
Securities available for sale
Securities available for sale	120,820,000	123,948,000
Obligations of states and political subdivisions \| Level 2 \| Recurring
Securities available for sale
Securities available for sale	$ 120,820,000	$ 123,948,000

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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