Loans and Leases (Recorded Investment, By Class, In Loans And Leases On Nonaccrual Status And Loans And Leases Greater Than 90 Days Past Due And Still Accruing) (Details) (Noncovered Loans, USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases	$ 82,583	$ 89,845	$ 66,363
Loans and leases greater than 90 days and accruing	12,301	11,272	13,828
Lease Financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases	1,182	1,075	146
Loans and leases greater than 90 days and accruing	3	0	1,268
Commercial Mortgage | Construction and Land Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases	8,506	14,930	11,995
Loans and leases greater than 90 days and accruing	158	541	182
Commercial Mortgage | Commercial Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases	46,722	48,869	31,222
Loans and leases greater than 90 days and accruing	3,565	1,671	1,180
Commercial Mortgage | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases	10,419	8,635	8,148
Loans and leases greater than 90 days and accruing	1,154	466	599
Commercial Mortgage | Other Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases	2,361	2,319	783
Loans and leases greater than 90 days and accruing	0	0	0
Non-Commercial Loans | Construction and Land Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases	848	668	0
Loans and leases greater than 90 days and accruing	423	111	862
Non-Commercial Loans | Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases	12,509	12,603	14,069
Loans and leases greater than 90 days and accruing	2,380	3,337	3,542
Non-Commercial Loans | Revolving Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases	0	0	0
Loans and leases greater than 90 days and accruing	3,589	3,877	4,467
Non-Commercial Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases	36	746	0
Loans and leases greater than 90 days and accruing	$ 1,029	$ 1,269	$ 1,728