Loans (Schedule Of Impaired Loans And Related Allowance And Charge-Off) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Financing Receivable, Impaired [Line Items]
Impaired Loans, Unpaid Principal Balance	$ 432,973	$ 500,722
Impaired Loans, Recorded Investment	321,973	381,992
Impaired Loans, Allowance	7,554	15,185
With Allocated Allowance [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, Unpaid Principal Balance	55,330	137,763
Impaired Loans, Recorded Investment	47,991	126,202
Impaired Loans, Allowance	7,554	15,185
With No Allocated Allowance [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, Unpaid Principal Balance	377,643	362,959
Impaired Loans, Recorded Investment	273,982	255,790
Commercial Loans [Member] | With Allocated Allowance [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, Unpaid Principal Balance	11,795	13,930
Impaired Loans, Recorded Investment	7,587	7,748
Impaired Loans, Allowance	3,336	2,925
Commercial Loans [Member] | With No Allocated Allowance [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, Unpaid Principal Balance	46,671	41,233
Impaired Loans, Recorded Investment	38,194	27,775
Real Estate Construction Loans [Member] | With Allocated Allowance [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, Unpaid Principal Balance		15,429
Impaired Loans, Recorded Investment		13,416
Impaired Loans, Allowance		7,470
Real Estate Construction Loans [Member] | With No Allocated Allowance [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, Unpaid Principal Balance	134,837	102,186
Impaired Loans, Recorded Investment	78,767	64,274
Commercial Mortgage Loans [Member] | With Allocated Allowance [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, Unpaid Principal Balance	29,722	98,593
Impaired Loans, Recorded Investment	28,023	96,449
Impaired Loans, Allowance	2,969	3,812
Commercial Mortgage Loans [Member] | With No Allocated Allowance [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, Unpaid Principal Balance	187,580	211,717
Impaired Loans, Recorded Investment	149,034	156,305
Residential Mortgage And Equity Lines [Member] | With Allocated Allowance [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, Unpaid Principal Balance	13,813	9,811
Impaired Loans, Recorded Investment	12,381	8,589
Impaired Loans, Allowance	1,249	978
Residential Mortgage And Equity Lines [Member] | With No Allocated Allowance [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, Unpaid Principal Balance	8,555	7,823
Impaired Loans, Recorded Investment	$ 7,987	$ 7,436