Loans - Credit Quality (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Loans by risk rating
Total Loans	$ 1,140,882	$ 1,101,256	$ 1,077,640
Commercial
Loans by risk rating
Total Loans	114,990	104,805	98,026
Real estate - commercial
Loans by risk rating
Total Loans	600,649		554,874
Real estate - commercial \| Owner occupied general purpose
Loans by risk rating
Total Loans	138,128	121,934
Real estate - commercial \| Owner occupied special purpose
Loans by risk rating
Total Loans	170,363	172,459
Real estate - commercial \| Non-owner occupied general purpose
Loans by risk rating
Total Loans	156,494	138,257
Real estate - commercial \| Non-owner occupied special purpose
Loans by risk rating
Total Loans	85,882	73,986
Real estate - commercial \| Retail properties
Loans by risk rating
Total Loans	34,692	37,178
Real estate - commercial \| Farm
Loans by risk rating
Total Loans	15,090	16,419
Real estate - construction
Loans by risk rating
Total Loans	41,936		30,996
Real estate - construction \| Homebuilder
Loans by risk rating
Total Loans	3,232	3,683
Real estate - construction \| Land
Loans by risk rating
Total Loans	1,893	4,645
Real estate - construction \| Commercial speculative
Loans by risk rating
Total Loans	15,859	13,148
Real estate - construction \| All other
Loans by risk rating
Total Loans	20,952	7,875
Real estate - residential
Loans by risk rating
Total Loans	365,602		376,859
Real estate - residential \| Investor
Loans by risk rating
Total Loans	130,286	148,293
Real estate - residential \| Owner occupied
Loans by risk rating
Total Loans	117,520	116,960
Real estate - residential \| Revolving and junior liens
Loans by risk rating
Total Loans	117,796	124,948
Consumer
Loans by risk rating
Total Loans	3,142	2,760	2,570
All other
Loans by risk rating
Total Loans	14,563	13,906	14,315
Pass
Loans by risk rating
Total Loans	1,062,110	996,251
Pass \| Commercial
Loans by risk rating
Total Loans	106,620	96,371
Pass \| Real estate - commercial \| Owner occupied general purpose
Loans by risk rating
Total Loans	129,530	105,683
Pass \| Real estate - commercial \| Owner occupied special purpose
Loans by risk rating
Total Loans	151,663	162,586
Pass \| Real estate - commercial \| Non-owner occupied general purpose
Loans by risk rating
Total Loans	145,153	122,844
Pass \| Real estate - commercial \| Non-owner occupied special purpose
Loans by risk rating
Total Loans	76,267	59,674
Pass \| Real estate - commercial \| Retail properties
Loans by risk rating
Total Loans	32,450	30,059
Pass \| Real estate - commercial \| Farm
Loans by risk rating
Total Loans	15,090	16,419
Pass \| Real estate - construction \| Homebuilder
Loans by risk rating
Total Loans	3,232	1,745
Pass \| Real estate - construction \| Land
Loans by risk rating
Total Loans	1,684	4,436
Pass \| Real estate - construction \| Commercial speculative
Loans by risk rating
Total Loans	11,815	7,674
Pass \| Real estate - construction \| All other
Loans by risk rating
Total Loans	20,367	7,109
Pass \| Real estate - residential \| Investor
Loans by risk rating
Total Loans	126,879	135,136
Pass \| Real estate - residential \| Owner occupied
Loans by risk rating
Total Loans	109,723	109,261
Pass \| Real estate - residential \| Revolving and junior liens
Loans by risk rating
Total Loans	113,933	120,589
Pass \| Consumer
Loans by risk rating
Total Loans	3,141	2,759
Pass \| All other
Loans by risk rating
Total Loans	14,563	13,906
Special Mention
Loans by risk rating
Total Loans	30,575	42,782
Special Mention \| Commercial
Loans by risk rating
Total Loans	4,119	7,953
Special Mention \| Real estate - commercial \| Owner occupied general purpose
Loans by risk rating
Total Loans	913	9,048
Special Mention \| Real estate - commercial \| Owner occupied special purpose
Loans by risk rating
Total Loans	12,558	1,968
Special Mention \| Real estate - commercial \| Non-owner occupied general purpose
Loans by risk rating
Total Loans	1,872	1,826
Special Mention \| Real estate - commercial \| Non-owner occupied special purpose
Loans by risk rating
Total Loans	8,143	9,840
Special Mention \| Real estate - commercial \| Retail properties
Loans by risk rating
Total Loans	2,242	2,989
Special Mention \| Real estate - construction \| Homebuilder
Loans by risk rating
Total Loans		1,770
Special Mention \| Real estate - construction \| Commercial speculative
Loans by risk rating
Total Loans	540	3,561
Special Mention \| Real estate - construction \| All other
Loans by risk rating
Total Loans		32
Special Mention \| Real estate - residential \| Investor
Loans by risk rating
Total Loans		3,407
Special Mention \| Real estate - residential \| Revolving and junior liens
Loans by risk rating
Total Loans	188	388
Substandard
Loans by risk rating
Total Loans	48,197	62,223
Substandard \| Commercial
Loans by risk rating
Total Loans	4,251	481
Substandard \| Real estate - commercial \| Owner occupied general purpose
Loans by risk rating
Total Loans	7,685	7,203
Substandard \| Real estate - commercial \| Owner occupied special purpose
Loans by risk rating
Total Loans	6,142	7,905
Substandard \| Real estate - commercial \| Non-owner occupied general purpose
Loans by risk rating
Total Loans	9,469	13,587
Substandard \| Real estate - commercial \| Non-owner occupied special purpose
Loans by risk rating
Total Loans	1,472	4,472
Substandard \| Real estate - commercial \| Retail properties
Loans by risk rating
Total Loans		4,130
Substandard \| Real estate - construction \| Homebuilder
Loans by risk rating
Total Loans		168
Substandard \| Real estate - construction \| Land
Loans by risk rating
Total Loans	209	209
Substandard \| Real estate - construction \| Commercial speculative
Loans by risk rating
Total Loans	3,504	1,913
Substandard \| Real estate - construction \| All other
Loans by risk rating
Total Loans	585	734
Substandard \| Real estate - residential \| Investor
Loans by risk rating
Total Loans	3,407	9,750
Substandard \| Real estate - residential \| Owner occupied
Loans by risk rating
Total Loans	7,797	7,699
Substandard \| Real estate - residential \| Revolving and junior liens
Loans by risk rating
Total Loans	3,675	3,971
Substandard \| Consumer
Loans by risk rating
Total Loans	$ 1	$ 1