Loans And Allowance For Loan Losses (Total Average Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	$ 41,333	$ 65,827	$ 44,234	$ 70,400
Restructured loans (accruing)	66,194	70,426	66,064	67,103
Total	107,527	136,253	110,298	137,503
Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	36,384	58,662	38,733	63,113
Restructured loans (accruing)	41,053	50,102	39,854	45,164
Total	77,437	108,764	78,587	108,277
Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	4,949	7,165	5,501	7,287
Restructured loans (accruing)	25,141	20,324	26,210	21,939
Total	$ 30,090	$ 27,489	$ 31,711	$ 29,226