Loans (Credit Quality Indicators - Commercial) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Commercial Mortgages | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	$ 1,044,335	$ 1,067,373
Commercial Mortgages | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	1,077	0
Commercial Mortgages | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	0	5,114
Commercial Construction & Development | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	171,866	138,008
Commercial Construction & Development | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	0	0
Commercial Construction & Development | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	0	0
Commercial Real Estate | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	1,216,201	1,205,381
Commercial Real Estate | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	1,077	0
Commercial Real Estate | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	0	5,114
Commercial & Industrial | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	559,377	592,749
Commercial & Industrial | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	37,290	9,804
Commercial & Industrial | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	7,163	9,781
Total Commercial | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	1,775,578	1,798,130
Total Commercial | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	38,367	9,804
Total Commercial | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	$ 7,163	$ 14,895