- Summary of Activity in the Loan Balances and the Allowance for Loan Losses by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Jun. 30, 2015	Dec. 31, 2014
Allowance for loan losses:
Balance, beginning of period	$ 16,797	$ 17,497	$ 17,416	$ 17,505	$ 17,505
Losses charged off	(965)	(1,033)	(1,658)	(2,031)	(3,824)
Recoveries	97	73	171	163	622
Provision charged to expense	0	893	0	1,793	3,113
Balance, end of period	15,929	17,430	15,929	17,430	17,416
Ending allowance balance attributable to loans:
Individually evaluated for impairment						$ 626	$ 1,016
Collectively evaluated for impairment						15,303	16,400
Total ending allowance balance	16,797	17,497	17,416	17,505	17,505	15,929	17,416
Loans:
Individually evaluated for impairment						14,347	16,618
Collectively evaluated for impairment						919,491	913,407
Total ending loans balance						933,838	930,025
Commercial real estate
Allowance for loan losses:
Balance, beginning of period	7,277	10,244	8,446	10,122	10,122
Losses charged off	(98)	(155)	(352)	(700)	(1,407)
Recoveries	11	14	21	21	261
Provision charged to expense	(367)	(159)	(1,292)	501	(530)
Balance, end of period	6,823	9,944	6,823	9,944	8,446
Ending allowance balance attributable to loans:
Individually evaluated for impairment						383	742
Collectively evaluated for impairment						6,440	7,704
Total ending allowance balance	7,277	10,244	8,446	10,122	10,122	6,823	8,446
Loans:
Individually evaluated for impairment						11,899	13,828
Collectively evaluated for impairment						410,852	411,564
Total ending loans balance						422,751	425,392
Commercial
Allowance for loan losses:
Balance, beginning of period	1,110	464	874	497	497
Losses charged off	(50)	0	(50)	0	(35)
Recoveries	1	1	2	2	33
Provision charged to expense	(80)	11	155	(23)	379
Balance, end of period	981	476	981	476	874
Ending allowance balance attributable to loans:
Individually evaluated for impairment						37	51
Collectively evaluated for impairment						944	823
Total ending allowance balance	1,110	464	874	497	497	981	874
Loans:
Individually evaluated for impairment						193	201
Collectively evaluated for impairment						76,235	77,324
Total ending loans balance						76,428	77,525
Residential Real Estate
Allowance for loan losses:
Balance, beginning of period	2,009	1,483	2,127	1,411	1,411
Losses charged off	(56)	(73)	(136)	(150)	(340)
Recoveries	1	3	1	6	7
Provision charged to expense	(97)	33	(135)	179	1,049
Balance, end of period	1,857	1,446	1,857	1,446	2,127
Ending allowance balance attributable to loans:
Individually evaluated for impairment						206	223
Collectively evaluated for impairment						1,651	1,904
Total ending allowance balance	2,009	1,483	2,127	1,411	1,411	1,857	2,127
Loans:
Individually evaluated for impairment						1,559	1,688
Collectively evaluated for impairment						70,021	69,808
Total ending loans balance						71,580	71,496
Home equity loans
Allowance for loan losses:
Balance, beginning of period	3,229	3,478	3,130	3,484	3,484
Losses charged off	(540)	(672)	(664)	(895)	(1,382)
Recoveries	7	8	13	19	76
Provision charged to expense	599	975	816	1,181	952
Balance, end of period	3,295	3,789	3,295	3,789	3,130
Ending allowance balance attributable to loans:
Individually evaluated for impairment						0	0
Collectively evaluated for impairment						3,295	3,130
Total ending allowance balance	3,229	3,478	3,130	3,484	3,484	3,295	3,130
Loans:
Individually evaluated for impairment						550	711
Collectively evaluated for impairment						127,316	125,218
Total ending loans balance						127,866	125,929
Indirect
Allowance for loan losses:
Balance, beginning of period	2,763	1,513	2,459	1,593	1,593
Losses charged off	(134)	(108)	(301)	(177)	(399)
Recoveries	74	40	119	97	214
Provision charged to expense	(162)	88	264	20	1,051
Balance, end of period	2,541	1,533	2,541	1,533	2,459
Ending allowance balance attributable to loans:
Individually evaluated for impairment						0	0
Collectively evaluated for impairment						2,541	2,459
Total ending allowance balance	2,763	1,513	2,459	1,593	1,593	2,541	2,459
Loans:
Individually evaluated for impairment						85	127
Collectively evaluated for impairment						220,783	216,072
Total ending loans balance						220,868	216,199
Consumer
Allowance for loan losses:
Balance, beginning of period	409	315	380	398	398
Losses charged off	(87)	(25)	(155)	(109)	(261)
Recoveries	3	7	15	18	31
Provision charged to expense	107	(55)	192	(65)	212
Balance, end of period	432	242	432	242	380
Ending allowance balance attributable to loans:
Individually evaluated for impairment						0	0
Collectively evaluated for impairment						432	380
Total ending allowance balance	$ 409	$ 315	$ 380	$ 398	$ 398	432	380
Loans:
Individually evaluated for impairment						61	63
Collectively evaluated for impairment						14,284	13,421
Total ending loans balance						$ 14,345	$ 13,484