Loans, Loans Modified in a Troubled Debt Restructuring (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) loan	Dec. 31, 2014 USD ($) loan	Dec. 31, 2013 USD ($) loan
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	211	309	278
Recorded Investment	$ 41,131	$ 38,870	$ 64,052
Unpaid Principal Balance	$ 42,765	$ 40,660	$ 71,319
Commercial and Industrial Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	12	15	48
Recorded Investment	$ 2,219	$ 7,681	$ 11,833
Unpaid Principal Balance	$ 2,900	$ 7,711	$ 14,543
Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	5	4	12
Recorded Investment	$ 3,694	$ 1,465	$ 8,823
Unpaid Principal Balance	$ 3,901	$ 1,625	$ 9,035
Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	5	6	25
Recorded Investment	$ 21,573	$ 6,097	$ 26,480
Unpaid Principal Balance	$ 21,640	$ 6,521	$ 28,516
Commercial Real Estate Construction Financing Receivable [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	4	2	9
Recorded Investment	$ 78	$ 15	$ 1,822
Unpaid Principal Balance	$ 79	$ 15	$ 1,961
Home Equity Portfolio Segments [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	88	117	82
Recorded Investment	$ 3,103	$ 3,913	$ 3,991
Unpaid Principal Balance	$ 3,249	$ 4,308	$ 4,242
Installment and Credit Cards [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	2	3
Recorded Investment	$ 0	$ 24	$ 193
Unpaid Principal Balance	$ 0	$ 26	$ 200
Residential Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	97	163	99
Recorded Investment	$ 10,464	$ 19,675	$ 10,910
Unpaid Principal Balance	$ 10,996	$ 20,454	$ 12,822