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Loans - Aging Analysis (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Aged analysis of past due loans
Total Past Due	$ 3,869	$ 3,717
Current	1,182,247	1,115,609
Nonaccrual	16,736	14,389
Total Loans	1,202,852	1,133,715	$ 1,132,912
Recorded Investment 90 days or Greater Past Due and Accruing	483	65
30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	1,732	2,942
60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	1,654	710
90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due	483	65
Commercial
Aged analysis of past due loans
Total Past Due	182	394
Current	183,269	140,848
Nonaccrual	583	73
Total Loans	184,034	141,315	129,733
Commercial | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	182	394
Real estate - commercial
Aged analysis of past due loans
Total Loans	617,280		609,937
Real estate - commercial | Owner occupied general purpose
Aged analysis of past due loans
Total Past Due	96	771
Current	125,733	123,479
Nonaccrual	1,492	1,254
Total Loans	127,321	125,504
Real estate - commercial | Owner occupied general purpose | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	96	652
Real estate - commercial | Owner occupied general purpose | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due		119
Real estate - commercial | Owner occupied special purpose
Aged analysis of past due loans
Total Past Due		358
Current	167,664	170,827
Nonaccrual	397	763
Total Loans	168,061	171,948
Real estate - commercial | Owner occupied special purpose | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due		358
Real estate - commercial | Non-owner occupied general purpose
Aged analysis of past due loans
Total Past Due	789
Current	159,923	166,668
Nonaccrual	2,463	975
Total Loans	163,175	167,643
Real estate - commercial | Non-owner occupied general purpose | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	789
Real estate - commercial | Non-owner occupied special purpose
Aged analysis of past due loans
Current	103,990	92,387
Nonaccrual	1,013
Total Loans	105,003	92,387
Real estate - commercial | Retail properties
Aged analysis of past due loans
Current	37,685	34,352
Nonaccrual	1,980
Total Loans	39,665	34,352
Real estate - commercial | Farm
Aged analysis of past due loans
Total Past Due	1,372
Current	12,683	12,615
Nonaccrual		1,272
Total Loans	14,055	13,887
Real estate - commercial | Farm | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	22
Real estate - commercial | Farm | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	1,350
Real estate - residential
Aged analysis of past due loans
Total Loans	357,846		354,106
Real estate - residential | Investor
Aged analysis of past due loans
Total Past Due	1,005	101
Current	129,302	125,611
Nonaccrual	910	972
Total Loans	131,217	126,684
Recorded Investment 90 days or Greater Past Due and Accruing	454
Real estate - residential | Investor | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	419	101
Real estate - residential | Investor | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	132
Real estate - residential | Investor | 90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due	454
Real estate - residential | Owner occupied
Aged analysis of past due loans
Total Past Due	70	1,529
Current	119,854	110,885
Nonaccrual	5,654	6,378
Total Loans	125,578	118,792
Real estate - residential | Owner occupied | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due		1,083
Real estate - residential | Owner occupied | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	70	446
Real estate - residential | Revolving and junior liens
Aged analysis of past due loans
Total Past Due	243	412
Current	98,640	102,500
Nonaccrual	2,168	2,619
Total Loans	101,051	105,531
Recorded Investment 90 days or Greater Past Due and Accruing	29
Real estate - residential | Revolving and junior liens | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	112	344
Real estate - residential | Revolving and junior liens | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	102	68
Real estate - residential | Revolving and junior liens | 90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due	29
Consumer
Aged analysis of past due loans
Total Past Due	10	4
Current	3,315	4,212
Total Loans	3,325	4,216	4,005
Consumer | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	10	4
All other
Aged analysis of past due loans
Current	11,581	11,650
Total Loans	11,581	11,650	11,670
Construction Loans | Real estate - commercial
Aged analysis of past due loans
Total Loans	28,786		$ 23,461
Construction Loans | Real estate - commercial | Homebuilder
Aged analysis of past due loans
Current	612	2,604
Total Loans	612	2,604
Construction Loans | Real estate - commercial | Land
Aged analysis of past due loans
Current	1,237	1,137
Total Loans	1,237	1,137
Construction Loans | Real estate - commercial | Commercial speculative
Aged analysis of past due loans
Current	8,901	2,117
Nonaccrual	76	83
Total Loans	8,977	2,200
Construction Loans | Real estate - commercial | All other
Aged analysis of past due loans
Total Past Due	102	148
Current	17,858	13,717
Total Loans	17,960	13,865
Recorded Investment 90 days or Greater Past Due and Accruing		65
Construction Loans | Real estate - commercial | All other | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	$ 102	6
Construction Loans | Real estate - commercial | All other | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due		77
Construction Loans | Real estate - commercial | All other | 90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due		$ 65

X

- Definition

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

+ 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 7
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+ References

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

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-URI http://asc.fasb.org/extlink&oid=65880944

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+ References

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