Loans and the Allowance for Loan Losses (Analysis of Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
No Related Allowance: Recorded Invesment	$ 1,275		$ 1,275		$ 1,500
No Related Allowance: Unpaid Principal Balance	1,576		1,576		1,950
With An Allowance Recorded: Recorded Investment	1,288	6,900	1,288	6,900	5,435
With An Allowance Recorded: Unpaid Principal Balance	1,487		1,487		5,435
With An Allowance Recorded: Related Allowance	219	758	219	758	645
Total Impaired: Recorded Investment	2,563		2,563		6,935
Total Impaired: Unpaid Principal Balance	3,063		3,063		7,385
Total Impaired: Related Allowance	219	758	219	758	645
No Related Allowance: Average Recorded Investment	1,275	2,246	1,275	2,246
No Related Allowance: Interest Income Recognized	19	28	57	86
With An Allowance Recorded: Average Recorded Investment	1,401	8,484	3,428	10,122
With An Allowance Recorded: Interest Income Recognized	10	34	99	145
Total Impaired: Average Recorded Investment	2,676	10,730	4,703	12,368
Total Impaired: Interest Income Recognized	29	62	156	231
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
No Related Allowance: Recorded Invesment	1,275		1,275		1,500
No Related Allowance: Unpaid Principal Balance	1,576		1,576		1,950
With An Allowance Recorded: Recorded Investment	175		175		4,180
With An Allowance Recorded: Unpaid Principal Balance	374		374		4,180
With An Allowance Recorded: Related Allowance	76		76		493
Total Impaired: Recorded Investment	1,450		1,450		5,680
Total Impaired: Unpaid Principal Balance	1,950		1,950		6,130
Total Impaired: Related Allowance	76		76		493
No Related Allowance: Average Recorded Investment	1,275	2,246	1,275	2,246
No Related Allowance: Interest Income Recognized	19	28	57	86
With An Allowance Recorded: Average Recorded Investment	175	4,180	2,202	4,180
With An Allowance Recorded: Interest Income Recognized	0	34	68	103
Total Impaired: Average Recorded Investment	1,450	6,426	3,477	6,426
Total Impaired: Interest Income Recognized	19	62	125	189
Construction [Member]
Financing Receivable, Impaired [Line Items]
With An Allowance Recorded: Average Recorded Investment	0	0	0	2,066
With An Allowance Recorded: Interest Income Recognized	0	0	0	16
Total Impaired: Average Recorded Investment	0	0	0	2,066
Total Impaired: Interest Income Recognized	0	0	0	16
Residential mortgage [Member]
Financing Receivable, Impaired [Line Items]
With An Allowance Recorded: Recorded Investment	1,113		1,113		1,255
With An Allowance Recorded: Unpaid Principal Balance	1,113		1,113		1,255
With An Allowance Recorded: Related Allowance	143		143		152
Total Impaired: Recorded Investment	1,113		1,113		1,255
Total Impaired: Unpaid Principal Balance	1,113		1,113		1,255
Total Impaired: Related Allowance	143		143		152
With An Allowance Recorded: Average Recorded Investment	1,226	4,304	1,226	3,876
With An Allowance Recorded: Interest Income Recognized	10	0	31	26
Total Impaired: Average Recorded Investment	1,226	4,304	1,226	3,876
Total Impaired: Interest Income Recognized	$ 10	$ 0	$ 31	$ 26