Loan Quality (Troubled Debt Restructurings) (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, Modifications [Line Items]
Number of Contracts		2	9	9
Pre-TDR Modification		$ 4,561	$ 5,367	$ 9,328
After-TDR Modification		2,693	5,600	7,460
Recorded Investment		2,519	4,778	4,607
Residential Real Estate - Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts			3
Pre-TDR Modification			2,073
After-TDR Modification			1,897
Recorded Investment			1,510
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1	1	2	2
Pre-TDR Modification	221	30	371	94
After-TDR Modification	240	30	390	94
Recorded Investment	240	29	386	90
Commercial, industrial and agricultural [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts			2	1
Pre-TDR Modification			2,223	2,856
After-TDR Modification			2,223	2,856
Recorded Investment			1,818
Commercial, industrial and agricultural real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts		1	2	6
Pre-TDR Modification		4,531	700	6,378
After-TDR Modification		2,663	1,090	4,510
Recorded Investment		$ 2,490	$ 1,064	$ 4,517