Loans And Leases (Loans And Leases, Net Of Unearned Income) (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Loans and Leases Receivable, Net of Deferred Income, by Type [Line Items]
Total loans and leases	$ 9,702,669	$ 9,633,197
Nonaccrual loans and leases	160,099	196,895
Loans and leases contractually past due 90 days and still accruing	13,034	20,588
Troubled debt restructurings	62,331	114,566
Commercial, Financial, And Agricultural [Member]
Loans and Leases Receivable, Net of Deferred Income, by Type [Line Items]
Total loans and leases	1,810,664	1,816,519
Real Estate - Construction [Member]
Loans and Leases Receivable, Net of Deferred Income, by Type [Line Items]
Total loans and leases	771,734	877,223
Real Estate Secured - Residential [Member]
Loans and Leases Receivable, Net of Deferred Income, by Type [Line Items]
Total loans and leases	2,728,934	2,666,692
Real Estate Secured - Commercial [Member]
Loans and Leases Receivable, Net of Deferred Income, by Type [Line Items]
Total loans and leases	3,013,787	2,998,176
Consumer [Member]
Loans and Leases Receivable, Net of Deferred Income, by Type [Line Items]
Total loans and leases	698,804	603,084
Leases [Member]
Loans and Leases Receivable, Net of Deferred Income, by Type [Line Items]
Total loans and leases	$ 678,746	$ 671,503