Loans (Summary Of Activity In Allowance For Loan And Lease Losses) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Sep. 30, 2012
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	$ 23,717	$ 26,766		$ 17,811
Charge-offs	(7,511)	(15,844)
Recoveries	6,321	4,797
Net (charge-offs) recoveries	(1,190)	(11,047)
Provision for loan losses	(4,716)	7,998	26,916
Ending balance	17,811	23,717	26,766	17,811
Period-end amount allocated to:
Loans individually evaluated for impairment	1,421	1,482
Loans collectively evaluated for impairment	16,390	22,235
Ending balance	17,811	23,717	26,766	17,811
Commercial Real Estate, Other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	18,947	21,806		14,215
Charge-offs	(5,146)	(11,249)
Recoveries	4,399	2,469
Net (charge-offs) recoveries	(747)	(8,780)
Provision for loan losses	(3,985)	5,921
Ending balance	14,215	18,947		14,215
Period-end amount allocated to:
Loans individually evaluated for impairment	1,262	1,026
Loans collectively evaluated for impairment	12,953	17,921
Ending balance	14,215	18,947		14,215
Commercial and Industrial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	2,434	2,160		1,733
Charge-offs	(34)	(1,033)
Recoveries	358	729
Net (charge-offs) recoveries	324	(304)
Provision for loan losses	(1,025)	578
Ending balance	1,733	2,434		1,733
Period-end amount allocated to:
Loans individually evaluated for impairment	36	407
Loans collectively evaluated for impairment	1,697	2,027
Ending balance	1,733	2,434		1,733
Residential Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	1,119	1,400		801
Charge-offs	(1,091)	(1,593)
Recoveries	773	636
Net (charge-offs) recoveries	(318)	(957)
Provision for loan losses	0	676
Ending balance	801	1,119		801
Period-end amount allocated to:
Loans individually evaluated for impairment	123	49
Loans collectively evaluated for impairment	678	1,070
Ending balance	801	1,119		801
Home Equity Lines of Credit
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	541	431		479
Charge-offs	(94)	(366)
Recoveries	32	51
Net (charge-offs) recoveries	(62)	(315)
Provision for loan losses	0	425
Ending balance	479	541		479
Period-end amount allocated to:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	479	541
Ending balance	479	541		479
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	449	721		438
Charge-offs	(572)	(939)
Recoveries	561	687
Net (charge-offs) recoveries	(11)	(252)
Provision for loan losses	0	(20)
Ending balance	438	449		438
Period-end amount allocated to:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	438	449
Ending balance	438	449		438
Deposit Account Overdrafts
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	227	248		145
Charge-offs	(574)	(664)
Recoveries	198	225
Net (charge-offs) recoveries	(376)	(439)
Provision for loan losses	294	418
Ending balance	145	227		145
Period-end amount allocated to:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	145	227
Ending balance	$ 145	$ 227		$ 145