Loans And Allowance For Loan Losses (Total Average Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	$ 37,436	$ 58,958	$ 41,943	$ 66,558
Restructured loans (accruing)	66,044	61,635	66,057	65,267
Total	103,480	120,593	108,000	131,825
Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	32,570	51,337	36,656	59,159
Restructured loans (accruing)	40,881	41,885	40,200	44,063
Total	73,451	93,222	76,856	103,222
Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	4,866	7,621	5,287	7,399
Restructured loans (accruing)	25,163	19,750	25,857	21,204
Total	$ 30,029	$ 27,371	$ 31,144	$ 28,603