Loans and Allowance for Loan Losses - Age Analysis of Past Due Loans (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-59 Days Past Due	$ 2,305	$ 2,319
60-89 Days Past Due	2,302	1,744
Greater than 90 Days	10,297	11,164
Total Past Due	14,904	15,227
Current	895,285	887,072
Total ending loans balance	910,189	902,299	889,931
Recorded Investment greater than 90 Days and Accruing	0	201
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-59 Days Past Due	741	525
60-89 Days Past Due	1,260	4
Greater than 90 Days	6,319	7,401
Total Past Due	8,320	7,930
Current	400,147	393,661
Total ending loans balance	408,467	401,591	415,753
Recorded Investment greater than 90 Days and Accruing	0	0
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-59 Days Past Due	68	0
60-89 Days Past Due	0	18
Greater than 90 Days	159	219
Total Past Due	227	237
Current	83,070	88,409
Total ending loans balance	83,297	88,646	75,909
Recorded Investment greater than 90 Days and Accruing	0	0
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-59 Days Past Due	422	347
60-89 Days Past Due	340	960
Greater than 90 Days	2,076	2,252
Total Past Due	2,838	3,559
Current	65,833	62,948
Total ending loans balance	68,671	66,507	64,486
Recorded Investment greater than 90 Days and Accruing	0	158
Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-59 Days Past Due	872	932
60-89 Days Past Due	591	707
Greater than 90 Days	1,643	1,078
Total Past Due	3,106	2,717
Current	119,718	120,359
Total ending loans balance	122,824	123,076	121,764
Recorded Investment greater than 90 Days and Accruing	0	43
Indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-59 Days Past Due	169	332
60-89 Days Past Due	51	30
Greater than 90 Days	5	23
Total Past Due	225	385
Current	209,469	205,938
Total ending loans balance	209,694	206,323	199,964
Recorded Investment greater than 90 Days and Accruing
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-59 Days Past Due	33	183
60-89 Days Past Due	60	25
Greater than 90 Days	95	191
Total Past Due	188	399
Current	17,048	15,757
Total ending loans balance	17,236	16,156	12,055
Recorded Investment greater than 90 Days and Accruing	$ 0	$ 0