Allowance for Loan and Lease Losses (Note Restructurings During Period) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) loans	Dec. 31, 2015 USD ($) loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 150,916	$ 144,843
Commercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	101,858	104,978
Commercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	3,600	3,881
Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	84,698	84,540
Commercial | Other commercial real estate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	1,715	1,840
Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	10,629	12,174
Commercial | Lease financing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	1,074	1,360
Commercial | Other
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	142	1,183
Noncommercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	49,058	39,865
Noncommercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	240	784
Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	39,129	32,556
Noncommercial | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	7,777	5,305
Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 124,547	$ 114,192
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	143	50
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 7,558	$ 8,326
Financing Receivable, Modifications, Number of Contracts | loans	503	372
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 41,031	$ 37,183
PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 26,369	$ 30,600
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 3	$ 96
Financing Receivable, Modifications, Number of Contracts | loans	10	18
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 6,444	$ 1,752
Principal Forgiveness [Member] | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	2	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 448	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	3	6
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 691	$ 1,052
Principal Forgiveness [Member] | Non-PCI Loans | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 326	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	2	3
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 569	$ 185
Principal Forgiveness [Member] | Non-PCI Loans | Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	0	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 776
Principal Forgiveness [Member] | Non-PCI Loans | Noncommercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 91
Principal Forgiveness [Member] | Non-PCI Loans | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 122	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 122	$ 0
Extended Maturity [Member] | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	3
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 40	$ 334
Financing Receivable, Modifications, Number of Contracts | loans	37	27
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 6,919	$ 4,858
Extended Maturity [Member] | Non-PCI Loans | Commercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 40	$ 18
Financing Receivable, Modifications, Number of Contracts | loans	1	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 40	$ 18
Extended Maturity [Member] | Non-PCI Loans | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 316
Financing Receivable, Modifications, Number of Contracts | loans	7	12
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 2,428	$ 3,144
Extended Maturity [Member] | Non-PCI Loans | Commercial | Other commercial real estate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 747	$ 0
Extended Maturity [Member] | Non-PCI Loans | Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	8	5
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1,070	$ 1,380
Extended Maturity [Member] | Non-PCI Loans | Commercial | Lease financing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	0	4
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 146
Extended Maturity [Member] | Non-PCI Loans | Noncommercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	2	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 421	$ 0
Extended Maturity [Member] | Non-PCI Loans | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	15	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 2,183	$ 110
Extended Maturity [Member] | Non-PCI Loans | Noncommercial | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 8
Extended Maturity [Member] | Non-PCI Loans | Noncommercial | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	3	3
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 30	$ 52
Extended Maturity [Member] | PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 178
Extended Maturity [Member] | PCI Loans | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 178
Interest Rate Below Market Reduction [Member] | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	87	24
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 6,054	$ 6,327
Financing Receivable, Modifications, Number of Contracts | loans	309	218
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 28,299	$ 24,728
Interest Rate Below Market Reduction [Member] | Non-PCI Loans | Commercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	3
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 122
Financing Receivable, Modifications, Number of Contracts | loans	6	21
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 231	$ 992
Interest Rate Below Market Reduction [Member] | Non-PCI Loans | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	16	3
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 1,986	$ 3,969
Financing Receivable, Modifications, Number of Contracts | loans	45	37
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 12,030	$ 13,900
Interest Rate Below Market Reduction [Member] | Non-PCI Loans | Commercial | Other commercial real estate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	3	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 619	$ 122
Interest Rate Below Market Reduction [Member] | Non-PCI Loans | Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	11	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 1,144	$ 1,619
Financing Receivable, Modifications, Number of Contracts | loans	34	15
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 3,056	$ 2,301
Interest Rate Below Market Reduction [Member] | Non-PCI Loans | Commercial | Lease financing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	4	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 152	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	4	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 152	$ 0
Interest Rate Below Market Reduction [Member] | Non-PCI Loans | Noncommercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	4	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 96	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	15	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 676	$ 253
Interest Rate Below Market Reduction [Member] | Non-PCI Loans | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	48	14
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 2,583	$ 607
Financing Receivable, Modifications, Number of Contracts | loans	185	116
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 11,087	$ 5,695
Interest Rate Below Market Reduction [Member] | Non-PCI Loans | Noncommercial | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	5	6
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 106	$ 136
Interest Rate Below Market Reduction [Member] | Non-PCI Loans | Noncommercial | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	2	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 15	$ 10
Financing Receivable, Modifications, Number of Contracts | loans	10	18
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 222	$ 146
Interest Rate Below Market Reduction [Member] | Non-PCI Loans | Noncommercial | Other
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 78	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	2	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 120	$ 1,183
Interest Rate Below Market Reduction [Member] | PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 96
Financing Receivable, Modifications, Number of Contracts | loans	8	14
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 3,479	$ 1,187
Interest Rate Below Market Reduction [Member] | PCI Loans | Commercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 52	$ 0
Interest Rate Below Market Reduction [Member] | PCI Loans | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	4	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 3,255	$ 0
Interest Rate Below Market Reduction [Member] | PCI Loans | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 96
Financing Receivable, Modifications, Number of Contracts | loans	3	14
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 172	$ 1,187
Discharge of Debt [Member] | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	53	23
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 1,016	$ 1,665
Financing Receivable, Modifications, Number of Contracts | loans	154	121
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 5,122	$ 6,545
Discharge of Debt [Member] | Non-PCI Loans | Commercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 22	$ 3
Financing Receivable, Modifications, Number of Contracts | loans	1	4
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 22	$ 38
Discharge of Debt [Member] | Non-PCI Loans | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	2	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 73	$ 644
Financing Receivable, Modifications, Number of Contracts | loans	4	4
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 347	$ 1,897
Discharge of Debt [Member] | Non-PCI Loans | Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	6	3
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 83	$ 146
Discharge of Debt [Member] | Non-PCI Loans | Commercial | Lease financing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 84	$ 0
Discharge of Debt [Member] | Non-PCI Loans | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	14	4
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 326	$ 242
Financing Receivable, Modifications, Number of Contracts | loans	22	29
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 773	$ 1,454
Discharge of Debt [Member] | Non-PCI Loans | Noncommercial | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	23	7
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 250	$ 75
Financing Receivable, Modifications, Number of Contracts | loans	69	25
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 770	$ 296
Discharge of Debt [Member] | Non-PCI Loans | Noncommercial | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	13	9
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 345	$ 701
Financing Receivable, Modifications, Number of Contracts | loans	51	56
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 3,043	$ 2,714
Discharge of Debt [Member] | PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 3	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	2	3
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 2,965	$ 387
Discharge of Debt [Member] | PCI Loans | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 3	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	2	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 2,965	$ 0
Discharge of Debt [Member] | PCI Loans | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	0	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 282
Discharge of Debt [Member] | PCI Loans | Noncommercial | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 105