Loans (Credit Quality Indicators - Commercial) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Commercial Mortgages | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable
Commercial Mortgages | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable
Commercial Mortgages | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable
Commercial Construction & Development | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable
Commercial Construction & Development | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable
Commercial Construction & Development | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable
Commercial Real Estate | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	1,235,579	1,205,381
Commercial Real Estate | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	1,065	0
Commercial Real Estate | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	3,706	5,114
Commercial & Industrial | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	593,673	592,749
Commercial & Industrial | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	55,012	9,804
Commercial & Industrial | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	8,197	9,781
Total Commercial | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	1,829,252	1,798,130
Total Commercial | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	56,077	9,804
Total Commercial | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	$ 11,903	$ 14,895