Allowance for Loan and Lease Losses (Note Restructurings During Period) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($) loans	Jun. 30, 2016 USD ($) loans	Jun. 30, 2017 USD ($) loans	Jun. 30, 2016 USD ($) loans
Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	126	110	275	221
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 7,466	$ 10,209	$ 17,721	$ 17,329
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	57	56	91	85
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 2,521	$ 3,113	$ 5,410	$ 4,773
Non-PCI Loans | Loan term extension
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	13	8	21	13
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 1,397	$ 2,327	$ 2,070	$ 3,316
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	2	1	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 32	$ 52	$ 32	$ 52
Non-PCI Loans | Loan term extension | Commercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans			0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $			$ 0	$ 401
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans			0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $			$ 0	$ 0
Non-PCI Loans | Loan term extension | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	2	1	4
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 434	$ 808	$ 434	$ 1,096
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Non-PCI Loans | Loan term extension | Commercial | Other commercial real estate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	1	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 841	$ 0	$ 841
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Non-PCI Loans | Loan term extension | Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	3	0	6	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 549	$ 0	$ 639	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	1	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Non-PCI Loans | Loan term extension | Commercial | Other
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans			1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $			$ 523	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans			0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $			$ 0	$ 0
Non-PCI Loans | Loan term extension | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	8	5	9	7
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 401	$ 678	$ 433	$ 978
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	1	1	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 32	$ 52	$ 32	$ 52
Non-PCI Loans | Loan term extension | Noncommercial | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	0	4	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 13	$ 0	$ 41	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Non-PCI Loans | Interest only period provided
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	3	0	3	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 571	$ 0	$ 571	$ 249
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	0	1	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 332	$ 0	$ 332	$ 249
Non-PCI Loans | Interest only period provided | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	2	0	2	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 406	$ 0	$ 406	$ 249
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	0	1	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 332	$ 0	$ 332	$ 249
Non-PCI Loans | Interest only period provided | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	0	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 165	$ 0	$ 165	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Non-PCI Loans | Below market interest rate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	70	70	154	142
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 4,056	$ 5,798	$ 12,075	$ 10,726
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	31	35	47	52
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 1,542	$ 2,417	$ 2,955	$ 3,706
Non-PCI Loans | Below market interest rate | Commercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	4	1	6
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 317	$ 0	$ 414
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	2	0	3
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 209	$ 0	$ 227
Non-PCI Loans | Below market interest rate | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	8	12	21	22
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 1,448	$ 1,741	$ 4,734	$ 2,866
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	5	5	6	9
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 420	$ 577	$ 509	$ 1,078
Non-PCI Loans | Below market interest rate | Commercial | Other commercial real estate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	1	1	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 498	$ 2	$ 498
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	1	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 12	$ 0	$ 12
Non-PCI Loans | Below market interest rate | Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	6	8	14	11
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 276	$ 694	$ 804	$ 704
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	2	5	2	5
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 88	$ 197	$ 88	$ 197
Non-PCI Loans | Below market interest rate | Commercial | Lease financing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans			3	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $			$ 760	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans			2	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $			$ 701	$ 0
Non-PCI Loans | Below market interest rate | Commercial | Other
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans			1	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $			$ 139	$ 85
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans			1	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $			$ 0	$ 85
Non-PCI Loans | Below market interest rate | Noncommercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	0	7	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 10	$ 0	$ 663	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Non-PCI Loans | Below market interest rate | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	48	42	95	94
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 2,266	$ 2,473	$ 4,894	$ 5,998
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	22	20	35	32
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 1,020	$ 1,337	$ 1,643	$ 2,107
Non-PCI Loans | Below market interest rate | Noncommercial | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	2	1	4
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 6	$ 59	$ 6	$ 141
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Non-PCI Loans | Below market interest rate | Noncommercial | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	6	1	10	3
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 50	$ 16	$ 73	$ 20
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	1	1	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 14	$ 0	$ 14	$ 0
Non-PCI Loans | Below market interest rate | Noncommercial | Other
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 85
Non-PCI Loans | Discharged from bankruptcy
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	40	32	97	65
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 1,442	$ 2,084	$ 3,005	$ 3,038
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	24	19	42	30
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 615	$ 644	$ 2,091	$ 766
Non-PCI Loans | Discharged from bankruptcy | Commercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	0	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 17	$ 0	$ 17	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	0	1	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 17	$ 0	$ 17	$ 14
Non-PCI Loans | Discharged from bankruptcy | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	2	2	2	2
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 410	$ 283	$ 410	$ 283
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Non-PCI Loans | Discharged from bankruptcy | Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	2	1	2
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 49	$ 0	$ 49
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	0	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Non-PCI Loans | Discharged from bankruptcy | Commercial | Lease financing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans			16	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $			$ 178	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans			0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $			$ 0	$ 0
Non-PCI Loans | Discharged from bankruptcy | Noncommercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	0	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 0	$ 20	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	0	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 20	$ 0	$ 20	$ 0
Non-PCI Loans | Discharged from bankruptcy | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	8	5	16	11
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 223	$ 147	$ 777	$ 721
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	7	7	8	7
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 77	$ 506	$ 956	$ 506
Non-PCI Loans | Discharged from bankruptcy | Noncommercial | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	12	13	20	25
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 570	$ 1,461	$ 1,093	$ 1,695
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	4	5	11	12
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 325	$ 59	$ 825	$ 151
Non-PCI Loans | Discharged from bankruptcy | Noncommercial | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	16	10	40	25
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 222	$ 144	$ 510	$ 290
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	10	7	20	10
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 176	$ 79	$ 273	$ 95
PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	3	1	5	5
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 384	$ 48	$ 507	$ 2,130
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	1	2	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 1,258	$ 54	$ 1,276	$ 54
PCI Loans | Below market interest rate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	3	1	5	5
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 384	$ 48	$ 507	$ 2,130
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	1	2	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 1,258	$ 54	$ 1,276	$ 54
PCI Loans | Below market interest rate | Commercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans			0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $			$ 0	$ 55
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans			0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $			$ 0	$ 0
PCI Loans | Below market interest rate | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	2	0	2	3
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 344	$ 0	$ 344	$ 2,027
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	0	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 1,258	$ 0	$ 1,258	$ 0
PCI Loans | Below market interest rate | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	1	3	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 40	$ 48	$ 163	$ 48
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	1	1	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 54	$ 18	$ 54