Loans (Schedule Of Impaired Loans And Related Allowance And Charge-Off) (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Impaired Loans, Unpaid Principal Balance	$ 478,276	$ 500,722
Impaired Loans, Recorded Investment	374,383	381,992
Impaired Loans, Allowance	14,264	15,185
Commercial Loans [Member] | With No Allocated Allowance [Member]
Impaired Loans, Unpaid Principal Balance	46,245	41,233
Impaired Loans, Recorded Investment	28,323	27,775
Commercial Loans [Member] | With Allocated Allowance [Member]
Impaired Loans, Unpaid Principal Balance	25,637	13,930
Impaired Loans, Recorded Investment	22,117	7,748
Impaired Loans, Allowance	2,482	2,925
Real Estate Construction Loans [Member] | With No Allocated Allowance [Member]
Impaired Loans, Unpaid Principal Balance	104,871	102,186
Impaired Loans, Recorded Investment	69,328	64,274
Real Estate Construction Loans [Member] | With Allocated Allowance [Member]
Impaired Loans, Unpaid Principal Balance	9,654	15,429
Impaired Loans, Recorded Investment	7,641	13,416
Impaired Loans, Allowance	7,140	7,470
Commercial Mortgage Loans [Member] | With No Allocated Allowance [Member]
Impaired Loans, Unpaid Principal Balance	225,912	211,717
Impaired Loans, Recorded Investment	183,926	156,305
Commercial Mortgage Loans [Member] | With Allocated Allowance [Member]
Impaired Loans, Unpaid Principal Balance	46,692	98,593
Impaired Loans, Recorded Investment	45,117	96,449
Impaired Loans, Allowance	3,481	3,812
Residential Mortgage And Equity Lines [Member] | With No Allocated Allowance [Member]
Impaired Loans, Unpaid Principal Balance	5,458	7,823
Impaired Loans, Recorded Investment	5,448	7,436
Residential Mortgage And Equity Lines [Member] | With Allocated Allowance [Member]
Impaired Loans, Unpaid Principal Balance	13,807	9,811
Impaired Loans, Recorded Investment	12,483	8,589
Impaired Loans, Allowance	1,161	978
With No Allocated Allowance [Member]
Impaired Loans, Unpaid Principal Balance	382,486	362,959
Impaired Loans, Recorded Investment	287,025	255,790
With Allocated Allowance [Member]
Impaired Loans, Unpaid Principal Balance	95,790	137,763
Impaired Loans, Recorded Investment	87,358	126,202
Impaired Loans, Allowance	$ 14,264	$ 15,185