Loans - Schedule of Allowance For Loan Losses And Recorded Investment In Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Allowance for Loan Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	$ 14,636	$ 14,865	$ 14,747	$ 15,172
Charge-offs	(165)	(109)	(460)	(787)
Recoveries	17	6	201	377
Provisions	0	0	0	0
Allowance for Loan Losses, Ending Balance	14,488	14,762	14,488	14,762
Allowance for Loan Losses, Ending Balance	14,636	14,865	14,747	15,172	$ 14,488	$ 14,747	$ 14,762
Allowance for loan losses: Ending balance: individually evaluated for impairment					167	0	0
Allowance for loan losses: Ending balance: collectively evaluated for impairment					14,321	14,747	14,762
Total Loans Receivable					872,023	852,960	825,252
Loans receivables: Ending balance: individually evaluated for impairment					10,350	10,491	10,289
Loans Receivable: Ending balance: collectively evaluated for impairment					861,673	842,469	814,963
Commercial and Industrial
Allowance for Loan Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	2,557	2,264	2,508	2,048
Charge-offs	(131)	(47)	(221)	(120)
Recoveries	5	2	44	365
Provisions	(80)	82	20	8
Allowance for Loan Losses, Ending Balance	2,351	2,301	2,351	2,301
Allowance for Loan Losses, Ending Balance	2,557	2,264	2,508	2,048	2,351	2,508	2,301
Allowance for loan losses: Ending balance: individually evaluated for impairment					0	0	0
Allowance for loan losses: Ending balance: collectively evaluated for impairment					2,351	2,508	2,301
Total Loans Receivable					122,926	117,692	103,245
Loans receivables: Ending balance: individually evaluated for impairment					1,249	1,471	1,515
Loans Receivable: Ending balance: collectively evaluated for impairment					121,677	116,221	101,730
Commercial Real Estate
Allowance for Loan Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	5,433	5,154	5,216	5,872
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provisions	(60)	32	157	(686)
Allowance for Loan Losses, Ending Balance	5,373	5,186	5,373	5,186
Allowance for Loan Losses, Ending Balance	5,433	5,154	5,216	5,872	5,373	5,216	5,186
Allowance for loan losses: Ending balance: individually evaluated for impairment					0	0	0
Allowance for loan losses: Ending balance: collectively evaluated for impairment					5,373	5,216	5,186
Total Loans Receivable					309,161	289,899	279,614
Loans receivables: Ending balance: individually evaluated for impairment					8,042	8,185	8,253
Loans Receivable: Ending balance: collectively evaluated for impairment					301,119	281,714	271,361
Commercial Real Estate Construction
Allowance for Loan Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	134	155	112	194
Charge-offs	0	0	(135)	(39)
Recoveries	0	0	132	0
Provisions	11	(7)	36	(7)
Allowance for Loan Losses, Ending Balance	145	148	145	148
Allowance for Loan Losses, Ending Balance	134	155	112	194	145	112	148
Allowance for loan losses: Ending balance: individually evaluated for impairment					0	0	0
Allowance for loan losses: Ending balance: collectively evaluated for impairment					145	112	148
Total Loans Receivable					13,243	13,429	15,057
Loans receivables: Ending balance: individually evaluated for impairment					300	374	114
Loans Receivable: Ending balance: collectively evaluated for impairment					12,943	13,055	14,943
Residential Mortgage
Allowance for Loan Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	3,311	3,361	3,349	3,845
Charge-offs	(6)	(38)	(45)	(542)
Recoveries	8	4	14	8
Provisions	(46)	24	(51)	40
Allowance for Loan Losses, Ending Balance	3,267	3,351	3,267	3,351
Allowance for Loan Losses, Ending Balance	3,311	3,361	3,349	3,845	3,267	3,349	3,351
Allowance for loan losses: Ending balance: individually evaluated for impairment					167	0	0
Allowance for loan losses: Ending balance: collectively evaluated for impairment					3,100	3,349	3,351
Total Loans Receivable					346,422	357,228	352,651
Loans receivables: Ending balance: individually evaluated for impairment					759	461	407
Loans Receivable: Ending balance: collectively evaluated for impairment					345,663	356,767	352,244
Home Equity Lines of Credit
Allowance for Loan Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	607	572	619	557
Charge-offs	0	0	(9)	(15)
Recoveries	0	0	0	0
Provisions	2	43	(1)	73
Allowance for Loan Losses, Ending Balance	609	615	609	615
Allowance for Loan Losses, Ending Balance	607	572	619	557	609	619	615
Allowance for loan losses: Ending balance: individually evaluated for impairment					0	0	0
Allowance for loan losses: Ending balance: collectively evaluated for impairment					609	619	615
Total Loans Receivable					65,689	60,124	59,639
Loans receivables: Ending balance: individually evaluated for impairment					0	0	0
Loans Receivable: Ending balance: collectively evaluated for impairment					65,689	60,124	59,639
Consumer
Allowance for Loan Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	952	1,090	1,083	1,050
Charge-offs	(28)	(24)	(50)	(71)
Recoveries	4	0	11	4
Provisions	(11)	12	(127)	95
Allowance for Loan Losses, Ending Balance	917	1,078	917	1,078
Allowance for Loan Losses, Ending Balance	952	1,090	1,083	1,050	917	1,083	1,078
Allowance for loan losses: Ending balance: individually evaluated for impairment					0	0	0
Allowance for loan losses: Ending balance: collectively evaluated for impairment					917	1,083	1,078
Total Loans Receivable					14,582	14,588	15,046
Loans receivables: Ending balance: individually evaluated for impairment					0	0	0
Loans Receivable: Ending balance: collectively evaluated for impairment					14,582	14,588	15,046
Unallocated
Allowance for Loan Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	1,642	2,269	1,860	1,606
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provisions	184	(186)	(34)	477
Allowance for Loan Losses, Ending Balance	1,826	2,083	1,826	2,083
Allowance for Loan Losses, Ending Balance	$ 1,642	$ 2,269	$ 1,860	$ 1,606	1,826	1,860	2,083
Allowance for loan losses: Ending balance: individually evaluated for impairment					0	0	0
Allowance for loan losses: Ending balance: collectively evaluated for impairment					1,826	1,860	2,083
Total Loans Receivable					0	0	0
Loans receivables: Ending balance: individually evaluated for impairment					0	0	0
Loans Receivable: Ending balance: collectively evaluated for impairment					$ 0	$ 0	$ 0