Loans and the Allowance for Loan Losses (Analysis of Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
No Related Allowance: Recorded Invesment	$ 1,500	$ 2,121
No Related Allowance: Unpaid Principal Balance	1,950	2,570
With An Allowance Recorded: Recorded Investment	5,435	11,825
With An Allowance Recorded: Unpaid Principal Balance	5,435	12,365
With An Allowance Recorded: Related Allowance	645	1,085
Total Impaired: Recorded Investment	6,935	13,946
Total Impaired: Unpaid Principal Balance	7,305	14,935
Total Impaired: Related Allowance	645	1,085
No Related Allowance: Average Recorded Investment	2,242	6,838
No Related Allowance: Interest Income Recognized		160
With An Allowance Recorded: Average Recorded Investment	11,743	12,203
With An Allowance Recorded: Interest Income Recognized	313	378
Total Impaired: Average Recorded Investment	11,743	19,041
Total Impaired: Interest Income Recognized	313	538
Commercial and industrial [Member]
Financing Receivable, Impaired [Line Items]
No Related Allowance: Recorded Invesment		2,121
No Related Allowance: Unpaid Principal Balance		2,570
No Related Allowance: Average Recorded Investment		3,390
No Related Allowance: Interest Income Recognized		149
Total Impaired: Average Recorded Investment		292
Total Impaired: Interest Income Recognized		11
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
No Related Allowance: Recorded Invesment	1,500
No Related Allowance: Unpaid Principal Balance	1,950
With An Allowance Recorded: Recorded Investment	4,180	4,180
With An Allowance Recorded: Unpaid Principal Balance	4,180	4,180
With An Allowance Recorded: Related Allowance	493	567
Total Impaired: Recorded Investment	5,680	6,301
Total Impaired: Unpaid Principal Balance	6,130	6,750
Total Impaired: Related Allowance	493	567
No Related Allowance: Average Recorded Investment	2,242	3,156
With An Allowance Recorded: Average Recorded Investment	4,179	4,583
With An Allowance Recorded: Interest Income Recognized	138	258
Total Impaired: Average Recorded Investment	6,421	7,973
Total Impaired: Interest Income Recognized	246	407
Construction [Member]
Financing Receivable, Impaired [Line Items]
With An Allowance Recorded: Recorded Investment		3,044
With An Allowance Recorded: Unpaid Principal Balance		3,584
With An Allowance Recorded: Related Allowance		200
Total Impaired: Recorded Investment		3,044
Total Impaired: Unpaid Principal Balance		3,584
Total Impaired: Related Allowance		200
With An Allowance Recorded: Average Recorded Investment	1,655	3,048
With An Allowance Recorded: Interest Income Recognized	16	18
Total Impaired: Average Recorded Investment	1,655	6,204
Total Impaired: Interest Income Recognized	16	18
Residential Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
With An Allowance Recorded: Recorded Investment	1,255	4,601
With An Allowance Recorded: Unpaid Principal Balance	1,255	4,601
With An Allowance Recorded: Related Allowance	152	318
Total Impaired: Recorded Investment	1,255	4,601
Total Impaired: Unpaid Principal Balance	1,255	4,601
Total Impaired: Related Allowance	152	318
With An Allowance Recorded: Average Recorded Investment	3,667	4,572
With An Allowance Recorded: Interest Income Recognized	51	102
Total Impaired: Average Recorded Investment	3,667	4,572
Total Impaired: Interest Income Recognized	$ 51	$ 102