Allowance for Loan and Lease Losses (Note Restructurings During Period) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 loans	Dec. 31, 2013 loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 151,479	$ 206,756
Commercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	118,166	174,393
Commercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	3,037	22,034
Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	101,121	136,710
Commercial | Other commercial real estate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	2,823	4,620
Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	10,528	10,980
Commercial | Lease financing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	623	49
Commercial | Other
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	34	0
Noncommercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	33,313	32,363
Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	27,252	27,006
Noncommercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	1,391	1,108
Noncommercial | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	3,675	3,095
Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	104,607	104,448
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	12	13
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	1,180	1,080
Financing Receivable, Modifications, Number of Contracts	248	148
Financing Receivable, Modifications, Post-Modification Recorded Investment	30,869	24,787
Non-PCI Loans | Interest Only Loan
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	364	0
Financing Receivable, Modifications, Number of Contracts	12	10
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,375	2,547
Non-PCI Loans | Loan Term Extension
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	63	23
Financing Receivable, Modifications, Post-Modification Recorded Investment	8,404	3,918
Non-PCI Loans | Below Market Interest Rate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	4	4
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	486	746
Financing Receivable, Modifications, Number of Contracts	137	77
Financing Receivable, Modifications, Post-Modification Recorded Investment	17,345	15,235
Non-PCI Loans | Discharge of Debt
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	5	8
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	330	334
Financing Receivable, Modifications, Number of Contracts	36	38
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,745	3,087
Non-PCI Loans | Commercial | Interest Only Loan | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	364	0
Financing Receivable, Modifications, Number of Contracts	6	6
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,973	1,520
Non-PCI Loans | Commercial | Interest Only Loan | Other commercial real estate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0
Non-PCI Loans | Commercial | Interest Only Loan | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	3	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	250	397
Non-PCI Loans | Commercial | Loan Term Extension | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	2	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	187	0
Non-PCI Loans | Commercial | Loan Term Extension | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	18	9
Financing Receivable, Modifications, Post-Modification Recorded Investment	4,848	3,270
Non-PCI Loans | Commercial | Loan Term Extension | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	5	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,274	47
Non-PCI Loans | Commercial | Loan Term Extension | Lease financing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	6	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	198	0
Non-PCI Loans | Commercial | Below Market Interest Rate | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	11	3
Financing Receivable, Modifications, Post-Modification Recorded Investment	372	609
Non-PCI Loans | Commercial | Below Market Interest Rate | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	3	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	441	295
Financing Receivable, Modifications, Number of Contracts	44	28
Financing Receivable, Modifications, Post-Modification Recorded Investment	12,642	10,873
Non-PCI Loans | Commercial | Below Market Interest Rate | Other commercial real estate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	1	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	337	378
Non-PCI Loans | Commercial | Below Market Interest Rate | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	13	3
Financing Receivable, Modifications, Post-Modification Recorded Investment	751	851
Non-PCI Loans | Commercial | Discharge of Debt | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	2	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	949	0
Non-PCI Loans | Noncommercial | Interest Only Loan | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	630
Non-PCI Loans | Noncommercial | Interest Only Loan | Lease financing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	2	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	118	0
Non-PCI Loans | Noncommercial | Interest Only Loan | Other
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	34	0
Non-PCI Loans | Noncommercial | Loan Term Extension | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	19	11
Financing Receivable, Modifications, Post-Modification Recorded Investment	572	539
Non-PCI Loans | Noncommercial | Loan Term Extension | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	7	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	226	0
Non-PCI Loans | Noncommercial | Loan Term Extension | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	6	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	99	62
Non-PCI Loans | Noncommercial | Below Market Interest Rate | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	45	0
Financing Receivable, Modifications, Number of Contracts	41	21
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,444	1,235
Non-PCI Loans | Noncommercial | Below Market Interest Rate | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	12	4
Financing Receivable, Modifications, Post-Modification Recorded Investment	389	269
Non-PCI Loans | Noncommercial | Below Market Interest Rate | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	3
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	451
Financing Receivable, Modifications, Number of Contracts	5	13
Financing Receivable, Modifications, Post-Modification Recorded Investment	217	801
Non-PCI Loans | Noncommercial | Below Market Interest Rate | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	10	3
Financing Receivable, Modifications, Post-Modification Recorded Investment	193	219
Non-PCI Loans | Noncommercial | Discharge of Debt | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	268	60
Financing Receivable, Modifications, Number of Contracts	12	7
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,067	510
Non-PCI Loans | Noncommercial | Discharge of Debt | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	62	0
Financing Receivable, Modifications, Number of Contracts	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	62	0
Non-PCI Loans | Noncommercial | Discharge of Debt | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	4	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	4	0
Non-PCI Loans | Noncommercial | Discharge of Debt | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	6
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	274
Financing Receivable, Modifications, Number of Contracts	17	31
Financing Receivable, Modifications, Post-Modification Recorded Investment	663	2,577
Loans Acquired With Deteriorated Credit Quality [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	46,872	102,308
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	15	14
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	214	12,059
Financing Receivable, Modifications, Number of Contracts	79	47
Financing Receivable, Modifications, Post-Modification Recorded Investment	12,206	24,477
Loans Acquired With Deteriorated Credit Quality [Member] | Interest Only Loan
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	2,889
Financing Receivable, Modifications, Number of Contracts	2	8
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	5,530
Loans Acquired With Deteriorated Credit Quality [Member] | Loan Term Extension
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	5	3
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	53	5,277
Financing Receivable, Modifications, Number of Contracts	4	12
Financing Receivable, Modifications, Post-Modification Recorded Investment	700	8,637
Loans Acquired With Deteriorated Credit Quality [Member] | Below Market Interest Rate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	6	9
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	161	3,893
Financing Receivable, Modifications, Number of Contracts	47	26
Financing Receivable, Modifications, Post-Modification Recorded Investment	9,847	10,200
Loans Acquired With Deteriorated Credit Quality [Member] | Discharge of Debt
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	26	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,659	0
Loans Acquired With Deteriorated Credit Quality [Member] | Commercial | Interest Only Loan | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	2,590
Financing Receivable, Modifications, Number of Contracts	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	2,590
Loans Acquired With Deteriorated Credit Quality [Member] | Commercial | Interest Only Loan | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	299
Financing Receivable, Modifications, Number of Contracts	2	5
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	2,880
Loans Acquired With Deteriorated Credit Quality [Member] | Commercial | Interest Only Loan | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	21
Loans Acquired With Deteriorated Credit Quality [Member] | Commercial | Loan Term Extension | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	1	6
Financing Receivable, Modifications, Post-Modification Recorded Investment	332	2,247
Loans Acquired With Deteriorated Credit Quality [Member] | Commercial | Loan Term Extension | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	157
Financing Receivable, Modifications, Number of Contracts	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	157
Loans Acquired With Deteriorated Credit Quality [Member] | Commercial | Loan Term Extension | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	0	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	1,080
Loans Acquired With Deteriorated Credit Quality [Member] | Commercial | Below Market Interest Rate | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	2	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	116	106
Loans Acquired With Deteriorated Credit Quality [Member] | Commercial | Below Market Interest Rate | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	3	4
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	138	2,418
Financing Receivable, Modifications, Number of Contracts	16	12
Financing Receivable, Modifications, Post-Modification Recorded Investment	5,783	7,513
Loans Acquired With Deteriorated Credit Quality [Member] | Commercial | Below Market Interest Rate | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	0	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	493
Loans Acquired With Deteriorated Credit Quality [Member] | Commercial | Other Concession | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	110
Loans Acquired With Deteriorated Credit Quality [Member] | Noncommercial | Interest Only Loan | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	39
Loans Acquired With Deteriorated Credit Quality [Member] | Noncommercial | Loan Term Extension | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	5	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	53	5,120
Financing Receivable, Modifications, Number of Contracts	2	3
Financing Receivable, Modifications, Post-Modification Recorded Investment	317	5,153
Loans Acquired With Deteriorated Credit Quality [Member] | Noncommercial | Loan Term Extension | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	51	0
Loans Acquired With Deteriorated Credit Quality [Member] | Noncommercial | Below Market Interest Rate | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	3	5
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	23	1,475
Financing Receivable, Modifications, Number of Contracts	29	10
Financing Receivable, Modifications, Post-Modification Recorded Investment	3,948	2,088
Loans Acquired With Deteriorated Credit Quality [Member] | Noncommercial | Discharge of Debt | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	26	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,659	0
Loans Acquired With Deteriorated Credit Quality [Member] | Noncommercial | Other Concession
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Financing Receivable, Modifications, Number of Contracts	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 110