Allowance for Loan and Lease Losses (Note Restructurings During Period) (Details) (USD $) In Thousands, unless otherwise specified							3 Months Ended																																																																			3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Mar. 31, 2013 Noncovered Loans	Dec. 31, 2012 Noncovered Loans	Mar. 31, 2012 Noncovered Loans	Mar. 31, 2013 Noncovered Loans All Restructuring loans	Mar. 31, 2012 Noncovered Loans All Restructuring loans	Mar. 31, 2013 Noncovered Loans Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Interest Only Loan All Restructuring loans	Mar. 31, 2012 Noncovered Loans Interest Only Loan All Restructuring loans	Mar. 31, 2013 Noncovered Loans Interest Only Loan Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Interest Only Loan Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Interest Only Loan Commercial Mortgage [Member] All Restructuring loans	Mar. 31, 2012 Noncovered Loans Interest Only Loan Commercial Mortgage All Restructuring loans	Mar. 31, 2013 Noncovered Loans Interest Only Loan Commercial Mortgage Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Interest Only Loan Commercial Mortgage Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Interest Only Loan Commercial and Industrial All Restructuring loans	Mar. 31, 2012 Noncovered Loans Interest Only Loan Commercial and Industrial All Restructuring loans	Mar. 31, 2013 Noncovered Loans Interest Only Loan Commercial and Industrial Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Interest Only Loan Commercial and Industrial Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Interest Only Loan Consumer All Restructuring loans	Mar. 31, 2012 Noncovered Loans Interest Only Loan Consumer All Restructuring loans	Mar. 31, 2013 Noncovered Loans Interest Only Loan Consumer Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Interest Only Loan Consumer Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Loan Term Extension All Restructuring loans	Mar. 31, 2012 Noncovered Loans Loan Term Extension All Restructuring loans	Mar. 31, 2013 Noncovered Loans Loan Term Extension Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Loan Term Extension Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Loan Term Extension Construction and Land Development - Commercial All Restructuring loans	Mar. 31, 2012 Noncovered Loans Loan Term Extension Construction and Land Development - Commercial All Restructuring loans	Mar. 31, 2013 Noncovered Loans Loan Term Extension Construction and Land Development - Commercial Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Loan Term Extension Construction and Land Development - Commercial Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Loan Term Extension Commercial Mortgage All Restructuring loans	Mar. 31, 2012 Noncovered Loans Loan Term Extension Commercial Mortgage All Restructuring loans	Mar. 31, 2013 Noncovered Loans Loan Term Extension Commercial Mortgage Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Loan Term Extension Commercial Mortgage Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Loan Term Extension Commercial and Industrial All Restructuring loans	Mar. 31, 2012 Noncovered Loans Loan Term Extension Commercial and Industrial All Restructuring loans	Mar. 31, 2013 Noncovered Loans Loan Term Extension Commercial and Industrial Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Loan Term Extension Commercial and Industrial Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Loan Term Extension Leases Financing All Restructuring loans	Mar. 31, 2012 Noncovered Loans Loan Term Extension Leases Financing All Restructuring loans	Mar. 31, 2013 Noncovered Loans Loan Term Extension Leases Financing Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Loan Term Extension Leases Financing Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Loan Term Extension Residential Mortgage All Restructuring loans	Mar. 31, 2012 Noncovered Loans Loan Term Extension Residential Mortgage All Restructuring loans	Mar. 31, 2013 Noncovered Loans Loan Term Extension Residential Mortgage Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Loan Term Extension Residential Mortgage Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Loan Term Extension Construction and Land Development - Non - Commercial All Restructuring loans	Mar. 31, 2012 Noncovered Loans Loan Term Extension Construction and Land Development - Non - Commercial All Restructuring loans	Mar. 31, 2013 Noncovered Loans Loan Term Extension Construction and Land Development - Non - Commercial Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Loan Term Extension Construction and Land Development - Non - Commercial Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Below Market Interest Rate All Restructuring loans	Mar. 31, 2012 Noncovered Loans Below Market Interest Rate All Restructuring loans	Mar. 31, 2013 Noncovered Loans Below Market Interest Rate Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Below Market Interest Rate Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Below Market Interest Rate Construction and Land Development - Commercial All Restructuring loans	Mar. 31, 2012 Noncovered Loans Below Market Interest Rate Construction and Land Development - Commercial All Restructuring loans	Mar. 31, 2013 Noncovered Loans Below Market Interest Rate Construction and Land Development - Commercial Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Below Market Interest Rate Construction and Land Development - Commercial Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Below Market Interest Rate Commercial Mortgage All Restructuring loans	Mar. 31, 2012 Noncovered Loans Below Market Interest Rate Commercial Mortgage All Restructuring loans	Mar. 31, 2013 Noncovered Loans Below Market Interest Rate Commercial Mortgage Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Below Market Interest Rate Commercial Mortgage Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Below Market Interest Rate Commercial and Industrial All Restructuring loans	Mar. 31, 2012 Noncovered Loans Below Market Interest Rate Commercial and Industrial All Restructuring loans	Mar. 31, 2013 Noncovered Loans Below Market Interest Rate Commercial and Industrial Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Below Market Interest Rate Commercial and Industrial Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Below Market Interest Rate Residential Mortgage All Restructuring loans	Mar. 31, 2012 Noncovered Loans Below Market Interest Rate Residential Mortgage All Restructuring loans	Mar. 31, 2013 Noncovered Loans Below Market Interest Rate Residential Mortgage Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Below Market Interest Rate Residential Mortgage Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Below Market Interest Rate Consumer All Restructuring loans	Mar. 31, 2012 Noncovered Loans Below Market Interest Rate Consumer All Restructuring loans	Mar. 31, 2013 Noncovered Loans Below Market Interest Rate Consumer Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Below Market Interest Rate Consumer Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Discharge of Debt [Member] All Restructuring loans	Mar. 31, 2012 Noncovered Loans Discharge of Debt [Member] All Restructuring loans	Mar. 31, 2013 Noncovered Loans Discharge of Debt [Member] Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Discharge of Debt [Member] Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Discharge of Debt [Member] Residential Mortgage All Restructuring loans	Mar. 31, 2012 Noncovered Loans Discharge of Debt [Member] Residential Mortgage All Restructuring loans	Mar. 31, 2013 Noncovered Loans Discharge of Debt [Member] Residential Mortgage Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Discharge of Debt [Member] Residential Mortgage Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Discharge of Debt [Member] Revolving Mortgage [Member] All Restructuring loans	Mar. 31, 2012 Noncovered Loans Discharge of Debt [Member] Revolving Mortgage [Member] All Restructuring loans	Mar. 31, 2013 Noncovered Loans Discharge of Debt [Member] Revolving Mortgage [Member] Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Discharge of Debt [Member] Revolving Mortgage [Member] Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Other Concession All Restructuring loans	Mar. 31, 2012 Noncovered Loans Other Concession All Restructuring loans	Mar. 31, 2013 Noncovered Loans Other Concession Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Other Concession Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Other Concession Commercial Mortgage All Restructuring loans	Mar. 31, 2012 Noncovered Loans Other Concession Commercial Mortgage All Restructuring loans	Mar. 31, 2013 Noncovered Loans Other Concession Commercial Mortgage Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Other Concession Commercial Mortgage Restructuring With Payment Default loans	Mar. 31, 2013 Noncovered Loans Other Concession Commercial and Industrial All Restructuring loans	Mar. 31, 2012 Noncovered Loans Other Concession Commercial and Industrial All Restructuring loans	Mar. 31, 2013 Noncovered Loans Other Concession Commercial and Industrial Restructuring With Payment Default loans	Mar. 31, 2012 Noncovered Loans Other Concession Commercial and Industrial Restructuring With Payment Default loans	Mar. 31, 2013 Covered Loans	Dec. 31, 2012 Covered Loans	Mar. 31, 2012 Covered Loans	Mar. 31, 2013 Covered Loans All Restructuring loans	Mar. 31, 2012 Covered Loans All Restructuring loans	Mar. 31, 2013 Covered Loans Restructuring With Payment Default loans	Mar. 31, 2012 Covered Loans Restructuring With Payment Default loans	Mar. 31, 2013 Covered Loans Interest Only Loan All Restructuring loans	Mar. 31, 2012 Covered Loans Interest Only Loan All Restructuring loans	Mar. 31, 2013 Covered Loans Interest Only Loan Restructuring With Payment Default loans	Mar. 31, 2012 Covered Loans Interest Only Loan Restructuring With Payment Default loans	Mar. 31, 2013 Covered Loans Interest Only Loan Construction and Land Development - Commercial All Restructuring loans	Mar. 31, 2012 Covered Loans Interest Only Loan Construction and Land Development - Commercial All Restructuring loans	Mar. 31, 2013 Covered Loans Interest Only Loan Construction and Land Development - Commercial Restructuring With Payment Default loans	Mar. 31, 2012 Covered Loans Interest Only Loan Construction and Land Development - Commercial Restructuring With Payment Default loans	Mar. 31, 2013 Covered Loans Interest Only Loan Commercial Mortgage All Restructuring loans	Mar. 31, 2012 Covered Loans Interest Only Loan Commercial Mortgage All Restructuring loans	Mar. 31, 2013 Covered Loans Interest Only Loan Commercial Mortgage Restructuring With Payment Default loans	Mar. 31, 2012 Covered Loans Interest Only Loan Commercial Mortgage Restructuring With Payment Default loans	Mar. 31, 2013 Covered Loans Loan Term Extension All Restructuring loans	Mar. 31, 2012 Covered Loans Loan Term Extension All Restructuring loans	Mar. 31, 2013 Covered Loans Loan Term Extension Restructuring With Payment Default loans	Mar. 31, 2012 Covered Loans Loan Term Extension Restructuring With Payment Default loans	Mar. 31, 2013 Covered Loans Loan Term Extension Construction and Land Development - Commercial All Restructuring loans	Mar. 31, 2012 Covered Loans Loan Term Extension Construction and Land Development - Commercial All Restructuring loans	Mar. 31, 2013 Covered Loans Loan Term Extension Construction and Land Development - Commercial Restructuring With Payment Default loans	Mar. 31, 2012 Covered Loans Loan Term Extension Construction and Land Development - Commercial Restructuring With Payment Default loans	Mar. 31, 2013 Covered Loans Loan Term Extension Commercial Mortgage All Restructuring loans	Mar. 31, 2012 Covered Loans Loan Term Extension Commercial Mortgage All Restructuring loans	Mar. 31, 2013 Covered Loans Loan Term Extension Commercial Mortgage Restructuring With Payment Default loans	Mar. 31, 2012 Covered Loans Loan Term Extension Commercial Mortgage Restructuring With Payment Default loans	Mar. 31, 2013 Covered Loans Loan Term Extension Residential Mortgage All Restructuring loans	Mar. 31, 2012 Covered Loans Loan Term Extension Residential Mortgage All Restructuring loans	Mar. 31, 2013 Covered Loans Loan Term Extension Residential Mortgage Restructuring With Payment Default loans	Mar. 31, 2012 Covered Loans Loan Term Extension Residential Mortgage Restructuring With Payment Default loans	Mar. 31, 2013 Covered Loans Below Market Interest Rate All Restructuring loans	Mar. 31, 2012 Covered Loans Below Market Interest Rate All Restructuring loans	Mar. 31, 2013 Covered Loans Below Market Interest Rate Restructuring With Payment Default loans	Mar. 31, 2012 Covered Loans Below Market Interest Rate Restructuring With Payment Default loans	Mar. 31, 2013 Covered Loans Below Market Interest Rate Construction and Land Development - Commercial All Restructuring loans	Mar. 31, 2012 Covered Loans Below Market Interest Rate Construction and Land Development - Commercial All Restructuring loans	Mar. 31, 2013 Covered Loans Below Market Interest Rate Construction and Land Development - Commercial Restructuring With Payment Default loans	Mar. 31, 2012 Covered Loans Below Market Interest Rate Construction and Land Development - Commercial Restructuring With Payment Default loans	Mar. 31, 2013 Covered Loans Below Market Interest Rate Commercial Mortgage All Restructuring loans	Mar. 31, 2012 Covered Loans Below Market Interest Rate Commercial Mortgage All Restructuring loans	Mar. 31, 2013 Covered Loans Below Market Interest Rate Commercial Mortgage Restructuring With Payment Default loans	Mar. 31, 2012 Covered Loans Below Market Interest Rate Commercial Mortgage Restructuring With Payment Default loans	Mar. 31, 2013 Covered Loans Below Market Interest Rate Commercial and Industrial All Restructuring loans	Mar. 31, 2012 Covered Loans Below Market Interest Rate Commercial and Industrial All Restructuring loans	Mar. 31, 2013 Covered Loans Below Market Interest Rate Commercial and Industrial Restructuring With Payment Default loans	Mar. 31, 2012 Covered Loans Below Market Interest Rate Commercial and Industrial Restructuring With Payment Default loans	Mar. 31, 2013 Covered Loans Below Market Interest Rate Residential Mortgage All Restructuring loans	Mar. 31, 2012 Covered Loans Below Market Interest Rate Residential Mortgage All Restructuring loans	Mar. 31, 2013 Covered Loans Below Market Interest Rate Residential Mortgage Restructuring With Payment Default loans	Mar. 31, 2012 Covered Loans Below Market Interest Rate Residential Mortgage Restructuring With Payment Default loans
Financing Receivable, Modifications [Line Items]
Number of loans							52	46	8	11	1	12	0	1	1	10	0	1	0	1	0	0	0	1	0	0	11	25	1	7	0	1	0	0	6	13	1	4	1	3	0	1	0	2	0	0	4	5	0	1	0	1	0	1	14	7	2	3	0	1	0	2	3	2	1	1	1	0	1	0	5	1	0	0	5	3	0	0	26	0	5	0	2	0	0	0	24	0	5	0	0	2	0	0	0	1	0	0	0	1	0	0				8	32	7	5	2	1	2	0	0	1	0	0	2	0	1	0	0	4	0	1	0	2	0	0	0	1	0	0	0	1	0	0	6	27	5	4	1	10	0	0	1	7	3	1	2	3	0	0	2	7	2	2
Recorded investment at period end							$ 10,257	$ 24,098	$ 1,856	$ 4,038	$ 356	$ 6,056	$ 0	$ 1,080	$ 356	$ 4,625	$ 0	$ 1,080	$ 0	$ 531	$ 0	$ 0	$ 0	$ 900	$ 0	$ 0	$ 2,986	$ 14,022	$ 483	$ 2,073	$ 0	$ 7,169	$ 0	$ 0	$ 2,117	$ 3,692	$ 483	$ 1,452	$ 186	$ 282	$ 0	$ 59	$ 0	$ 73	$ 0	$ 0	$ 683	$ 805	$ 0	$ 167	$ 0	$ 2,001	$ 0	$ 395	$ 4,738	$ 3,829	$ 1,140	$ 885	$ 0	$ 231	$ 0	$ 763	$ 2,556	$ 1,956	$ 1,024	$ 122	$ 17	$ 764	$ 116	$ 0	$ 675	$ 878	$ 0	$ 0	$ 1,490	$ 0	$ 0	$ 0	$ 2,177	$ 0	$ 233	$ 0	$ 299	$ 0	$ 0	$ 0	$ 1,878	$ 0	$ 233	$ 0	$ 0	$ 191	$ 0	$ 0	$ 0	$ 168	$ 0	$ 0	$ 0	$ 23	$ 0	$ 0				$ 6,430	$ 13,628	$ 4,336	$ 3,580	$ 1,991	$ 133	$ 388	$ 0	$ 0	$ 133	$ 0	$ 0	$ 1,991	$ 0	$ 291	$ 0	$ 0	$ 690	$ 0	$ 145	$ 0	$ 161	$ 0	$ 0	$ 0	$ 480	$ 0	$ 0	$ 0	$ 49	$ 0	$ 0	$ 4,439	$ 12,805	$ 3,948	$ 3,435	$ 309	$ 1,794	$ 0	$ 0	$ 2,946	$ 9,194	$ 3,222	$ 2,449	$ 458	$ 260	$ 0	$ 0	$ 726	$ 1,557	$ 726	$ 915
Value of restructured loans	$ 320,642	$ 333,170	$ 318,323	$ 138,231	$ 139,963	$ 152,466																																																																																																	$ 182,411	$ 193,207	$ 165,857
Minimum amount of nonaccrual status for loans to qualify to be individually evaluated for impairment	500,000