Loans (Summary Of Activity In Allowance For Loan And Lease Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	$ 17,811	$ 23,717	$ 21,249
Charge-offs	(991)	(2,571)
Recoveries	1,684	2,240
Net (charge-offs) recoveries	693	(331)
Provision for loan losses	(1,065)	(2,137)
Ending balance	17,439	17,811	21,249
Period-end amount allocated to:
Loans individually evaluated for impairment	1,618	937
Loans collectively evaluated for impairment	15,821	20,312
Ending balance	17,439	17,811	21,249
Commercial Real Estate, Other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	14,215	18,947	17,496
Charge-offs	(566)	(1,957)
Recoveries	1,374	1,606
Net (charge-offs) recoveries	808	(351)
Provision for loan losses	(1,050)	(1,100)
Ending balance	13,973	14,215	17,496
Period-end amount allocated to:
Loans individually evaluated for impairment	1,226	587
Loans collectively evaluated for impairment	12,747	16,909
Ending balance	13,973	14,215	17,496
Commercial and Industrial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	1,733	2,434	1,457
Charge-offs	0	0
Recoveries	17	48
Net (charge-offs) recoveries	17	48
Provision for loan losses	0	(1,025)
Ending balance	1,750	1,733	1,457
Period-end amount allocated to:
Loans individually evaluated for impairment	315	0
Loans collectively evaluated for impairment	1,435	1,457
Ending balance	1,750	1,733	1,457
Residential Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	801	1,119	1,216
Charge-offs	(134)	(207)
Recoveries	116	304
Net (charge-offs) recoveries	(18)	97
Provision for loan losses	0	0
Ending balance	783	801	1,216
Period-end amount allocated to:
Loans individually evaluated for impairment	77	350
Loans collectively evaluated for impairment	706	866
Ending balance	783	801	1,216
Home Equity Lines of Credit
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	479	541	477
Charge-offs	(2)	(71)
Recoveries	8	7
Net (charge-offs) recoveries	6	(64)
Provision for loan losses	0	0
Ending balance	485	479	477
Period-end amount allocated to:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	485	477
Ending balance	485	479	477
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	438	449	423
Charge-offs	(159)	(214)
Recoveries	104	188
Net (charge-offs) recoveries	(55)	(26)
Provision for loan losses	0	0
Ending balance	383	438	423
Period-end amount allocated to:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	383	423
Ending balance	383	438	423
Deposit Account Overdrafts
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	145	227	180
Charge-offs	(130)	(122)
Recoveries	65	87
Net (charge-offs) recoveries	(65)	(35)
Provision for loan losses	(15)	(12)
Ending balance	65	145	180
Period-end amount allocated to:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	65	180
Ending balance	$ 65	$ 145	$ 180