Loans and Allowance for Loan Losses - Aging (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Aging categories of performing loans and nonaccrual loans
Current	$ 1,065,353	$ 1,013,306
Past Due	10,720	18,864
Total Loans	1,076,073	1,032,170	$ 994,833
Non-Accrual	6,543	9,405
90 Days+ Still Accruing	3,659	848
30-59 Days Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	2,151	3,323
60-89 Days Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	202	5,521
90 Days + Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	8,367	10,020
Commercial
Aging categories of performing loans and nonaccrual loans
Current	739,941	714,151
Past Due	10,103	15,168
Total Loans	750,044	729,319	699,659
Non-Accrual	5,500	8,195
90 Days+ Still Accruing	3,659	848
Commercial \| 30-59 Days Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	1,981	1,414
Commercial \| 60-89 Days Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	100	4,731
Commercial \| 90 Days + Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	8,022	9,023
Commercial \| Commercial Business
Aging categories of performing loans and nonaccrual loans
Current	337,569	299,515
Past Due	735	968
Total Loans	338,304	300,483
Non-Accrual	493	687
90 Days+ Still Accruing	0	0
Commercial \| Commercial Business \| 30-59 Days Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	142	300
Commercial \| Commercial Business \| 60-89 Days Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	100	0
Commercial \| Commercial Business \| 90 Days + Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	493	668
Commercial \| Commercial Real Estate
Aging categories of performing loans and nonaccrual loans
Current	296,153	307,029
Past Due	5,908	10,728
Total Loans	302,061	317,757
Non-Accrual	2,202	5,020
90 Days+ Still Accruing	3,659	541
Commercial \| Commercial Real Estate \| 30-59 Days Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	1,184	436
Commercial \| Commercial Real Estate \| 60-89 Days Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	0	4,731
Commercial \| Commercial Real Estate \| 90 Days + Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	4,724	5,561
Commercial \| Acquisition & Development
Aging categories of performing loans and nonaccrual loans
Current	106,219	107,607
Past Due	3,460	3,472
Total Loans	109,679	111,079
Non-Accrual	2,805	2,488
90 Days+ Still Accruing	0	307
Commercial \| Acquisition & Development \| 30-59 Days Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	655	678
Commercial \| Acquisition & Development \| 60-89 Days Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	0	0
Commercial \| Acquisition & Development \| 90 Days + Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	2,805	2,794
Residential
Aging categories of performing loans and nonaccrual loans
Current	243,180	214,326
Past Due	307	3,040
Total Loans	243,487	217,366	211,846
Non-Accrual	845	803
90 Days+ Still Accruing	0	0
Residential \| 30-59 Days Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	43	1,838
Residential \| 60-89 Days Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	83	576
Residential \| 90 Days + Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	181	626
Home Equity
Aging categories of performing loans and nonaccrual loans
Current	67,771	67,908
Past Due	68	216
Total Loans	67,839	68,124	65,645
Non-Accrual	57	36
90 Days+ Still Accruing	0	0
Home Equity \| 30-59 Days Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	45	23
Home Equity \| 60-89 Days Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	0	193
Home Equity \| 90 Days + Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	23	0
Consumer
Aging categories of performing loans and nonaccrual loans
Current	14,461	16,921
Past Due	242	440
Total Loans	14,703	17,361	$ 17,683
Non-Accrual	141	371
90 Days+ Still Accruing	0	0
Consumer \| 30-59 Days Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	82	48
Consumer \| 60-89 Days Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	19	21
Consumer \| 90 Days + Past Due
Aging categories of performing loans and nonaccrual loans
Past Due	$ 141	$ 371

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Recorded Investment
-URI http://asc.fasb.org/extlink&oid=65880944

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5111-111524

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Financing receivables that are current.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953401-111524

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Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

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Recorded Investment in financing receivables that are past due at the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Recorded Investment
-URI http://asc.fasb.org/extlink&oid=65880944

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953401-111524

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=65884687&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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