- 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		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Allowance for loan losses:
Balance, beginning of period	$ 17,497	$ 17,806	$ 17,505	$ 17,637
Losses charged off	(1,033)	(1,667)	(2,031)	(3,095)
Recoveries	73	626	163	873
Provision charged to expense	893	1,050	1,793	2,400
Balance, end of period	17,430	17,815	17,430	17,815
Ending allowance balance attributable to loans:
Individually evaluated for impairment	857		857		938
Collectively evaluated for impairment	16,573		16,573		16,567
Total ending allowance balance	17,430	17,815	17,430	17,815
Loans:
Individually evaluated for impairment	20,258		20,258		21,511
Collectively evaluated for impairment	887,107		887,107		880,788
Total ending loans balance	907,365		907,365		902,299
Commercial real estate
Allowance for loan losses:
Balance, beginning of period	10,244	10,784	10,122	11,386
Losses charged off	(155)	(721)	(700)	(844)
Recoveries	14	494	21	500
Provision charged to expense	(159)	(133)	501	(618)
Balance, end of period	9,944	10,424	9,944	10,424
Ending allowance balance attributable to loans:
Individually evaluated for impairment	772		772		865
Collectively evaluated for impairment	9,172		9,172		9,257
Total ending allowance balance	9,944	10,424	9,944	10,424
Loans:
Individually evaluated for impairment	16,193		16,193		17,842
Collectively evaluated for impairment	389,392		389,392		383,749
Total ending loans balance	405,585		405,585		401,591
Commercial
Allowance for loan losses:
Balance, beginning of period	464	534	497	835
Losses charged off	0	(58)	0	(120)
Recoveries	1	1	2	5
Provision charged to expense	11	(39)	(23)	(282)
Balance, end of period	476	438	476	438
Ending allowance balance attributable to loans:
Individually evaluated for impairment	85		85		73
Collectively evaluated for impairment	391		391		424
Total ending allowance balance	476	438	476	438
Loans:
Individually evaluated for impairment	1,646		1,646		472
Collectively evaluated for impairment	83,929		83,929		88,174
Total ending loans balance	85,575		85,575		88,646
Residential Real Estate
Allowance for loan losses:
Balance, beginning of period	1,483	1,664	1,411	1,559
Losses charged off	(73)	(130)	(150)	(643)
Recoveries	3	35	6	100
Provision charged to expense	33	37	179	590
Balance, end of period	1,446	1,606	1,446	1,606
Ending allowance balance attributable to loans:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	1,446		1,446		1,411
Total ending allowance balance	1,446	1,606	1,446	1,606
Loans:
Individually evaluated for impairment	1,237		1,237		1,731
Collectively evaluated for impairment	66,132		66,132		64,776
Total ending loans balance	67,369		67,369		66,507
Home equity loans
Allowance for loan losses:
Balance, beginning of period	3,478	2,948	3,484	2,357
Losses charged off	(672)	(593)	(895)	(1,029)
Recoveries	8	8	19	54
Provision charged to expense	975	1,145	1,181	2,126
Balance, end of period	3,789	3,508	3,789	3,508
Ending allowance balance attributable to loans:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	3,789		3,789		3,484
Total ending allowance balance	3,789	3,508	3,789	3,508
Loans:
Individually evaluated for impairment	953		953		1,111
Collectively evaluated for impairment	122,295		122,295		121,965
Total ending loans balance	123,248		123,248		123,076
Indirect
Allowance for loan losses:
Balance, beginning of period	1,513	1,610	1,593	1,230
Losses charged off	(108)	(134)	(177)	(350)
Recoveries	40	77	97	171
Provision charged to expense	88	28	20	530
Balance, end of period	1,533	1,581	1,533	1,581
Ending allowance balance attributable to loans:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	1,533		1,533		1,593
Total ending allowance balance	1,533	1,581	1,533	1,581
Loans:
Individually evaluated for impairment	165		165		195
Collectively evaluated for impairment	212,537		212,537		206,128
Total ending loans balance	212,702		212,702		206,323
Consumer
Allowance for loan losses:
Balance, beginning of period	315	266	398	270
Losses charged off	(25)	(31)	(109)	(109)
Recoveries	7	11	18	43
Provision charged to expense	(55)	12	(65)	54
Balance, end of period	242	258	242	258
Ending allowance balance attributable to loans:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	242		242		398
Total ending allowance balance	242	258	242	258
Loans:
Individually evaluated for impairment	64		64		160
Collectively evaluated for impairment	12,822		12,822		15,996
Total ending loans balance	$ 12,886		$ 12,886		$ 16,156