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 [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011
Nonaccrual loans and leases	$ 66,363	$ 52,741	$ 79,858
Loans and leases greater than 90 days and accruing	13,828	14,840	11,078
Commercial Mortgage [Member]
Nonaccrual loans and leases	31,222	23,748	33,428
Loans and leases greater than 90 days and accruing	1,180	3,107	1,929
Commercial And Industrial [Member]
Nonaccrual loans and leases	8,148	1,864	4,583
Loans and leases greater than 90 days and accruing	599	320	683
Lease Financing [Member]
Nonaccrual loans and leases	146	200	1,115
Loans and leases greater than 90 days and accruing	1,268	554	65
Other Commercial Real Estate [Member]
Nonaccrual loans and leases	783	1,170	871
Loans and leases greater than 90 days and accruing	0	0	0
Residential Mortgage [Member]
Nonaccrual loans and leases	14,069	10,657	12,932
Loans and leases greater than 90 days and accruing	3,542	4,227	1,646
Revolving Mortgage [Member]
Nonaccrual loans and leases	0	0	0
Loans and leases greater than 90 days and accruing	4,467	4,306	3,189
Consumer [Member]
Nonaccrual loans and leases	0	0	0
Loans and leases greater than 90 days and accruing	1,728	1,441	1,769
Commercial Mortgage [Member] | Construction and Land Development [Member]
Nonaccrual loans and leases	11,995	15,102	25,789
Loans and leases greater than 90 days and accruing	182	313	658
Non-Commercial Loans [Member] | Construction and Land Development [Member]
Nonaccrual loans and leases	0	0	1,140
Loans and leases greater than 90 days and accruing	$ 862	$ 572	$ 1,139