Loans (Impaired Loans Interest Income Recognized) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Financing Receivable, Impaired [Line Items]
Average Recorded Investment of Impaired Loans	$ 30,260	$ 31,233	$ 32,493	$ 30,796
Interest Income Recognized on Impaired Loans	197	161	699	565
Commercial Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment of Impaired Loans	8,041	13,159	9,117	13,856
Interest Income Recognized on Impaired Loans	21	40	73	220
Commercial Construction & Development [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment of Impaired Loans	0	0	0	0
Interest Income Recognized on Impaired Loans	0	0	0	0
Commercial & Industrial [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment of Impaired Loans	6,427	2,342	6,750	3,141
Interest Income Recognized on Impaired Loans	67	21	219	42
Residential Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment of Impaired Loans	15,107	13,962	15,750	11,985
Interest Income Recognized on Impaired Loans	102	86	374	253
Homeowner Construction [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment of Impaired Loans	0	0	0	0
Interest Income Recognized on Impaired Loans	0	0	0	0
Home Equity Lines [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment of Impaired Loans	73	297	81	427
Interest Income Recognized on Impaired Loans	1	2	5	10
Home Equity Loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment of Impaired Loans	470	1,328	653	1,240
Interest Income Recognized on Impaired Loans	4	9	20	33
Other Consumer [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment of Impaired Loans	142	145	142	147
Interest Income Recognized on Impaired Loans	$ 2	$ 3	$ 8	$ 7