- Summary of Activity in the Loan Balances and the Allowance for Loan Losses by Segment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	$ 17,505	$ 17,637	$ 17,637
Losses charged off	(998)	(1,428)	(6,019)
Recoveries	90	247	1,512
Provision charged to expense	900	1,350	4,375
Balance, end of period	17,497	17,806	17,505
Ending allowance balance attributable to loans:
Individually evaluated for impairment	917	1,970	938
Collectively evaluated for impairment	16,580	15,836	16,567
Total ending allowance balance	17,497	17,806	17,505
Loans:
Individually evaluated for impairment	19,124	27,137	21,511
Collectively evaluated for impairment	891,065	862,794	880,788
Total ending loans balance	910,189	889,931	902,299
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	10,122	11,386	11,386
Losses charged off	(546)	(123)	(2,325)
Recoveries	6	7	697
Provision charged to expense	662	(486)	364
Balance, end of period	10,244	10,784	10,122
Ending allowance balance attributable to loans:
Individually evaluated for impairment	838	1,778	865
Collectively evaluated for impairment	9,406	9,006	9,257
Total ending allowance balance	10,244	10,784	10,122
Loans:
Individually evaluated for impairment	16,175	23,941	17,842
Collectively evaluated for impairment	392,292	391,812	383,749
Total ending loans balance	408,467	415,753	401,591
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	497	835	835
Losses charged off	0	(63)	(121)
Recoveries	1	4	8
Provision charged to expense	(34)	(242)	(225)
Balance, end of period	464	534	497
Ending allowance balance attributable to loans:
Individually evaluated for impairment	73	192	73
Collectively evaluated for impairment	391	342	424
Total ending allowance balance	464	534	497
Loans:
Individually evaluated for impairment	460	564	472
Collectively evaluated for impairment	82,837	75,345	88,174
Total ending loans balance	83,297	75,909	88,646
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	1,411	1,559	1,559
Losses charged off	(77)	(513)	(754)
Recoveries	2	64	350
Provision charged to expense	147	554	256
Balance, end of period	1,483	1,664	1,411
Ending allowance balance attributable to loans:
Individually evaluated for impairment	6	0	0
Collectively evaluated for impairment	1,477	1,664	1,411
Total ending allowance balance	1,483	1,664	1,411
Loans:
Individually evaluated for impairment	1,254	1,991	1,731
Collectively evaluated for impairment	67,417	62,495	64,776
Total ending loans balance	68,671	64,486	66,507
Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	3,484	2,357	2,357
Losses charged off	(222)	(436)	(1,775)
Recoveries	11	47	66
Provision charged to expense	205	980	2,836
Balance, end of period	3,478	2,948	3,484
Ending allowance balance attributable to loans:
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	3,478	2,948	3,484
Total ending allowance balance	3,478	2,948	3,484
Loans:
Individually evaluated for impairment	980	483	1,111
Collectively evaluated for impairment	121,844	121,281	121,965
Total ending loans balance	122,824	121,764	123,076
Indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	1,593	1,230	1,230
Losses charged off	(70)	(216)	(678)
Recoveries	58	94	335
Provision charged to expense	(68)	502	706
Balance, end of period	1,513	1,610	1,593
Ending allowance balance attributable to loans:
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	1,513	1,610	1,593
Total ending allowance balance	1,513	1,610	1,593
Loans:
Individually evaluated for impairment	190	99	195
Collectively evaluated for impairment	209,504	199,865	206,128
Total ending loans balance	209,694	199,964	206,323
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	398	270	270
Losses charged off	(83)	(77)	(366)
Recoveries	12	31	56
Provision charged to expense	(12)	42	438
Balance, end of period	315	266	398
Ending allowance balance attributable to loans:
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	315	266	398
Total ending allowance balance	315	266	398
Loans:
Individually evaluated for impairment	65	59	160
Collectively evaluated for impairment	17,171	11,996	15,996
Total ending loans balance	$ 17,236	$ 12,055	$ 16,156