Allowance for Loan and Lease Losses (Note Restructurings During Period) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) loans	Mar. 31, 2015 USD ($) loans
PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	4	7
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 2,030	$ 470
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 65
PCI Loans | Below market interest rate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	4	7
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 2,030	$ 470
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 65
PCI Loans | Below market interest rate | Commercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 14	$ 0
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	3	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 2,016	$ 0
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 | Commercial and industrial
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	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 65
PCI Loans | Below market interest rate | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	7
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 470
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0
Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	82	59
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 6,062	$ 11,718
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	32	8
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 1,974	$ 4,941
Non-PCI Loans | Loan term extension
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	3	6
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 438	$ 770
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 220
Non-PCI Loans | Loan term extension | Commercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 404	$ 220
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 220
Non-PCI Loans | Loan term extension | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	3
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 535
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	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 34	$ 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 | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 10
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 | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 5
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0
Non-PCI Loans | Interest only period provided
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 252	$ 3,796
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 252	$ 3,796
Non-PCI Loans | Interest only period provided | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 252	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 252	$ 0
Non-PCI Loans | Interest only period provided | Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 3,796
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 3,796
Non-PCI Loans | Below market interest rate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	62	45
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 4,813	$ 6,866
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	18	4
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 1,370	$ 778
Non-PCI Loans | Below market interest rate | Commercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	2
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 18	$ 47
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 18	$ 0
Non-PCI Loans | Below market interest rate | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	10	9
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 1,422	$ 3,541
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	4	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 511	$ 733
Non-PCI Loans | Below market interest rate | Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	3	3
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 12	$ 172
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0
Non-PCI Loans | Below market interest rate | Noncommercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	2
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 396
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0
Non-PCI Loans | Below market interest rate | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	46	23
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 3,288	$ 708
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	13	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 841	$ 45
Non-PCI Loans | Below market interest rate | Noncommercial | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	2
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 18
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0
Non-PCI Loans | Below market interest rate | Noncommercial | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	2	3
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 73	$ 34
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0
Non-PCI Loans | Below market interest rate | Noncommercial | Other
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 1,950
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
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	16	7
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 559	$ 286
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	13	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 352	$ 147
Non-PCI Loans | Discharged from bankruptcy | Commercial | Construction and land development
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	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 16	$ 0
Non-PCI Loans | Discharged from bankruptcy | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	2
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 144	$ 68
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 | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	8	5
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 347	$ 218
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	8	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 277	$ 147
Non-PCI Loans | Discharged from bankruptcy | Noncommercial | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	7	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 68	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	4	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 59	$ 0