Loans (Summary Of Activity In Allowance For Loan And Lease Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			$ 23,717	$ 26,766
Charge-offs			(4,941)	(13,492)
Recoveries			4,044	3,468
Net (charge-offs) recoveries			(897)	(10,024)
Provision for loan losses	(956)	865	(4,213)	8,471
Ending balance	18,607	25,213	18,607	25,213
Period-end amount allocated to:
Loans individually evaluated for impairment	767	1,859	767	1,859
Loans collectively evaluated for impairment	17,840	23,354	17,840	23,354
Ending balance	18,607	25,213	18,607	25,213
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			18,947	21,806
Charge-offs			(3,112)	(9,715)
Recoveries			2,538	1,453
Net (charge-offs) recoveries			(574)	(8,262)
Provision for loan losses			(3,400)	6,541
Ending balance	14,973	20,085	14,973	20,085
Period-end amount allocated to:
Loans individually evaluated for impairment	731	1,095	731	1,095
Loans collectively evaluated for impairment	14,242	18,990	14,242	18,990
Ending balance	14,973	20,085	14,973	20,085
Commercial and Industrial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			2,434	2,160
Charge-offs			0	(1,004)
Recoveries			258	629
Net (charge-offs) recoveries			258	(375)
Provision for loan losses			(1,025)	578
Ending balance	1,667	2,363	1,667	2,363
Period-end amount allocated to:
Loans individually evaluated for impairment	0	522	0	522
Loans collectively evaluated for impairment	1,667	1,841	1,667	1,841
Ending balance	1,667	2,363	1,667	2,363
Residential Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			1,119	1,400
Charge-offs			(890)	(1,253)
Recoveries			608	598
Net (charge-offs) recoveries			(282)	(655)
Provision for loan losses			0	676
Ending balance	837	1,421	837	1,421
Period-end amount allocated to:
Loans individually evaluated for impairment	36	242	36	242
Loans collectively evaluated for impairment	801	1,179	801	1,179
Ending balance	837	1,421	837	1,421
Real Estate Construction
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			0	0
Charge-offs			0	0
Recoveries			0	0
Net (charge-offs) recoveries			0	0
Provision for loan losses			0	0
Ending balance	0	0	0	0
Period-end amount allocated to:
Loans individually evaluated for impairment	0	0	0	0
Loans collectively evaluated for impairment	0	0	0	0
Ending balance	0	0	0	0
Home Equity Lines of Credit
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			541	431
Charge-offs			(94)	(345)
Recoveries			23	37
Net (charge-offs) recoveries			(71)	(308)
Provision for loan losses			0	425
Ending balance	470	548	470	548
Period-end amount allocated to:
Loans individually evaluated for impairment	0	0	0	0
Loans collectively evaluated for impairment	470	548	470	548
Ending balance	470	548	470	548
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			449	721
Charge-offs			(428)	(687)
Recoveries			459	560
Net (charge-offs) recoveries			31	(127)
Provision for loan losses			0	(20)
Ending balance	480	574	480	574
Period-end amount allocated to:
Loans individually evaluated for impairment	0	0	0	0
Loans collectively evaluated for impairment	480	574	480	574
Ending balance	480	574	480	574
Deposit Account Overdrafts
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			227	248
Charge-offs			(417)	(488)
Recoveries			158	191
Net (charge-offs) recoveries			(259)	(297)
Provision for loan losses			212	271
Ending balance	180	222	180	222
Period-end amount allocated to:
Loans individually evaluated for impairment	0	0	0	0
Loans collectively evaluated for impairment	180	222	180	222
Ending balance	$ 180	$ 222	$ 180	$ 222