Allowance For Loan Losses And Credit Quality Of Financing Receivables (Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Total Recorded Investment	$ 18,522	$ 27,694
Total Unpaid Principal Balance	22,971	30,572
Related Allowance	365	1,957
Average Recorded Investment	25,133	27,528
Interest Income Recognized	303	408
Commercial And Industrial Loans [Member]
Financing Receivable, Impaired [Line Items]
With an allowance recorded, Recorded Investment	27	32
With an allowance recorded, Unpaid Principal Balance	27	32
With an allowance recorded, Average Recorded Investment	177	72
Total Recorded Investment	27	32
Total Unpaid Principal Balance	27	32
Related Allowance	27	16
Average Recorded Investment	177	72
Construction [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance, Recorded Investment	2,421	2,062
With no related allowance, Unpaid Principal Balance	2,743	2,331
With no recorded allowance, Average Recorded Investment	3,217	3,030
With no recorded allowance, Interest Income Recognized	41	1
With an allowance recorded, Recorded Investment	42	396
With an allowance recorded, Unpaid Principal Balance	42	396
With an allowance recorded, Average Recorded Investment	66	1,633
Total Recorded Investment	2,463	2,458
Total Unpaid Principal Balance	2,785	2,727
Related Allowance	42	50
Average Recorded Investment	3,283	4,663
Interest Income Recognized	41	1
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance, Recorded Investment	10,466	10,346
With no related allowance, Unpaid Principal Balance	13,581	12,932
With no recorded allowance, Average Recorded Investment	13,131	11,547
With no recorded allowance, Interest Income Recognized	81	198
With an allowance recorded, Recorded Investment	2,216	12,376
With an allowance recorded, Unpaid Principal Balance	3,135	12,399
With an allowance recorded, Average Recorded Investment	5,792	9,335
With an allowance recorded, Interest Income Recognized	64	150
Total Recorded Investment	12,682	22,722
Total Unpaid Principal Balance	16,716	25,331
Related Allowance	230	1,572
Average Recorded Investment	18,923	20,882
Interest Income Recognized	145	348
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance, Recorded Investment	2,675	1,758
With no related allowance, Unpaid Principal Balance	2,768	1,758
With no recorded allowance, Average Recorded Investment	2,192	1,235
With no recorded allowance, Interest Income Recognized	91	58
With an allowance recorded, Recorded Investment	675	724
With an allowance recorded, Unpaid Principal Balance	675	724
With an allowance recorded, Average Recorded Investment	558	676
With an allowance recorded, Interest Income Recognized	26	1
Total Recorded Investment	3,350	2,482
Total Unpaid Principal Balance	3,443	2,482
Related Allowance	66	319
Average Recorded Investment	2,750	1,911
Interest Income Recognized	$ 117	$ 59