Loans (Schedule Of Average Balance And Interest Income Recognized Related To Impaired Loans) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Financing Receivable, Impaired [Line Items]
Impaired Loans, Average Recorded Investment	$ 332,258	$ 370,336	$ 374,828	$ 375,537
Impaired Loans, Interest Income Recognized	1,656	1,234	5,378	3,008
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, Average Recorded Investment	55,599	31,574	49,370	35,669
Impaired Loans, Interest Income Recognized	264	36	789	122
Real Estate Construction Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, Average Recorded Investment	78,307	88,496	83,011	95,010
Impaired Loans, Interest Income Recognized	488	243	1,461	729
Commercial Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, Average Recorded Investment	180,554	238,708	225,195	234,045
Impaired Loans, Interest Income Recognized	895	940	3,100	2,120
Residential Mortgage And Equity Lines [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, Average Recorded Investment	17,798	11,558	17,252	10,813
Impaired Loans, Interest Income Recognized	$ 9	$ 15	$ 28	$ 37