Loans (Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Impaired Financing Receivable With Related Allowance [Abstract]
Specific Allowance	$ 123	$ 100	$ 123	$ 100	$ 100
Impaired Financing Receivables Total [Abstract]
Recorded balance, total	3,844	7,395	3,844	7,395	6,700
Unpaid principal balance, total	3,844	7,901	3,844	7,901	6,700
Average investment in impaired loans, total	4,677	7,520	5,613	7,798	7,578
Interest income recognized, total	28	48	98	180	225
Commercial Real Estate [Member]
Impaired Financing Receivable With No Related Allowance [Abstract]
Recorded balance	1,143	4,105	1,143	4,105	3,608
Unpaid principal balance	1,143	4,105	1,143	4,105	3,608
Average investment in impaired loans	2,018	4,228	2,596	4,241	4,115
Interest income recognized	19	40	67	135	172
Impaired Financing Receivable With Related Allowance [Abstract]
Recorded balance	284	820	284	820	676
Unpaid principal balance	284	820	284	820	676
Specific Allowance	123	100	123	100	100
Average investment in impaired loans	359	820	491	822	793
Interest income recognized			1	20	20
Impaired Financing Receivables Total [Abstract]
Recorded balance, total	1,427	4,925	1,427	4,925	4,284
Unpaid principal balance, total	1,427	4,925	1,427	4,925	4,284
Average investment in impaired loans, total	2,377	5,048	3,087	5,063	4,908
Interest income recognized, total	19	40	68	155	192
Commercial Segment [Member] | Construction Loans [Member]
Impaired Financing Receivable With No Related Allowance [Abstract]
Recorded balance	827	649	827	649	595
Unpaid principal balance	827	1,155	827	1,155	595
Average investment in impaired loans	841	648	887	770	735
Interest income recognized	9	8	30	23	31
Impaired Financing Receivables Total [Abstract]
Recorded balance, total	827	649	827	649	595
Unpaid principal balance, total	827	1,155	827	1,155	595
Average investment in impaired loans, total	841	648	887	770	735
Interest income recognized, total	9	8	30	23	31
Commercial Segment [Member] | Commercial and Industrial [Member]
Impaired Financing Receivable With No Related Allowance [Abstract]
Recorded balance	194	219	194	219	214
Unpaid principal balance	194	219	194	219	214
Average investment in impaired loans	197	221	204	475	423
Interest income recognized				2	2
Impaired Financing Receivables Total [Abstract]
Recorded balance, total	194	219	194	219	214
Unpaid principal balance, total	194	219	194	219	214
Average investment in impaired loans, total	197	221	204	475	423
Interest income recognized, total				2	2
Consumer [Member] | First Mortgage [Member]
Impaired Financing Receivable With No Related Allowance [Abstract]
Recorded balance	1,396	1,126	1,396	1,126	1,126
Unpaid principal balance	1,396	1,126	1,396	1,126	1,126
Average investment in impaired loans	1,262	1,127	1,194	1,133	1,131
Impaired Financing Receivables Total [Abstract]
Recorded balance, total	1,396	1,126	1,396	1,126	1,126
Unpaid principal balance, total	1,396	1,126	1,396	1,126	1,126
Average investment in impaired loans, total	$ 1,262	1,127	1,194	1,133	1,131
Consumer [Member] | Second Mortgage [Member]
Impaired Financing Receivable With No Related Allowance [Abstract]
Recorded balance		476		476	481
Unpaid principal balance		476		476	481
Average investment in impaired loans		476	241	357	381
Impaired Financing Receivables Total [Abstract]
Recorded balance, total		476		476	481
Unpaid principal balance, total		476		476	481
Average investment in impaired loans, total		$ 476	$ 241	$ 357	$ 381