Loans and Allowance for Credit Losses Troubled Debt Restructuring Modification (Details) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2016 USD ($) loans	Sep. 30, 2015 USD ($) loans	Sep. 30, 2016 USD ($) loans	Sep. 30, 2015 USD ($) loans
Financing Receivable, Modifications [Line Items]
Number of Loans \| loans	42	21	115	72
Post-Modification Recorded Investment \| $	$ 3,823	$ 2,359	$ 10,302	$ 16,051
Extended Maturity With Rate Concession [Member] \| Commercial - Secured [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| loans	0	2	0	2
Post-Modification Recorded Investment \| $	$ 0	$ 1,374	$ 0	$ 1,374
Extended Maturity With Rate Concession [Member] \| Real-estate commercial mortage [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| loans	0	2	0	2
Post-Modification Recorded Investment \| $	$ 0	$ 188	$ 0	$ 188
Extended Maturity With Rate Concession [Member] \| Real-estate - residential mortgage [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| loans	0	1	0	2
Post-Modification Recorded Investment \| $	$ 0	$ 171	$ 0	$ 276
Extended Maturity Without Rate Concession [Member] \| Commercial - Secured [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| loans	4	1	10	12
Post-Modification Recorded Investment \| $	$ 1,826	$ 6	$ 3,801	$ 7,830
Extended Maturity Without Rate Concession [Member] \| Commercial - unsecured [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| loans	0	0	2	1
Post-Modification Recorded Investment \| $	$ 0	$ 0	$ 103	$ 42
Extended Maturity Without Rate Concession [Member] \| Real-estate commercial mortage [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| loans	0	0	0	4
Post-Modification Recorded Investment \| $	$ 0	$ 0	$ 0	$ 2,626
Extended Maturity Without Rate Concession [Member] \| Real-estate - home equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| loans	24	5	63	5
Post-Modification Recorded Investment \| $	$ 1,063	$ 341	$ 3,058	$ 341
Extended Maturity Without Rate Concession [Member] \| Real-estate - residential mortgage [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| loans	0	0	2	2
Post-Modification Recorded Investment \| $	$ 0	$ 0	$ 315	$ 225
Extended Maturity Without Rate Concession [Member] \| Construction - commercial residential [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| loans	0	0	0	1
Post-Modification Recorded Investment \| $	$ 0	$ 0	$ 0	$ 889
Bankruptcy [Member] \| Real-estate - home equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| loans	11	9	33	34
Post-Modification Recorded Investment \| $	$ 563	$ 221	$ 2,279	$ 1,452
Bankruptcy [Member] \| Real-estate - residential mortgage [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| loans	2	1	3	6
Post-Modification Recorded Investment \| $	$ 350	$ 58	$ 723	$ 795
Bankruptcy [Member] \| Consumer - direct [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| loans	0	0	1	0
Post-Modification Recorded Investment \| $	$ 0	$ 0	$ 2	$ 0
Bankruptcy [Member] \| Consumer - Indirect [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| loans	1	0	1	1
Post-Modification Recorded Investment \| $	$ 21	$ 0	$ 21	$ 13

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953676-111524

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+ References

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