Fair Value of Financial Instruments (Quantitative Information about Level 3 Fair Value Measurements) (Details) (USD $) In Thousands, unless otherwise specified			3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Commercial construction [Member]	Mar. 31, 2013 Commercial construction [Member] Appraisal Adjustments [Member]	Mar. 31, 2013 Commercial construction [Member] Disposal Costs [Member]	Mar. 31, 2013 Commercial mortgage [Member]		Mar. 31, 2013 Commercial mortgage [Member] Disposal Costs [Member]		Mar. 31, 2013 Residential mortgage [Member]	Mar. 31, 2013 Residential mortgage [Member] Appraisal Adjustments [Member]	Mar. 31, 2013 Residential mortgage [Member] Disposal Costs [Member]	Mar. 31, 2013 Minimum [Member] Commercial construction [Member] Appraisal Adjustments [Member]	Mar. 31, 2013 Minimum [Member] Commercial construction [Member] Disposal Costs [Member]	Mar. 31, 2013 Minimum [Member] Commercial mortgage [Member] Disposal Costs [Member]	Mar. 31, 2013 Minimum [Member] Residential mortgage [Member] Appraisal Adjustments [Member]	Mar. 31, 2013 Minimum [Member] Residential mortgage [Member] Disposal Costs [Member]	Mar. 31, 2013 Maximum [Member] Commercial construction [Member] Appraisal Adjustments [Member]	Mar. 31, 2013 Maximum [Member] Commercial construction [Member] Disposal Costs [Member]	Mar. 31, 2013 Maximum [Member] Commercial mortgage [Member] Disposal Costs [Member]	Mar. 31, 2013 Maximum [Member] Residential mortgage [Member] Appraisal Adjustments [Member]	Mar. 31, 2013 Maximum [Member] Residential mortgage [Member] Disposal Costs [Member]	Mar. 31, 2013 Weighted Average [Member] Commercial construction [Member] Appraisal Adjustments [Member]	Mar. 31, 2013 Weighted Average [Member] Commercial construction [Member] Disposal Costs [Member]	Mar. 31, 2013 Weighted Average [Member] Commercial mortgage [Member] Disposal Costs [Member]	Mar. 31, 2013 Weighted Average [Member] Residential mortgage [Member] Appraisal Adjustments [Member]	Mar. 31, 2013 Weighted Average [Member] Residential mortgage [Member] Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans Fair Value Disclosure	$ 5,499	$ 6,823	$ 1,864			$ 3,368				$ 267
Valuation Techniques			Appraisal of collateral (1)			Appraisal of collateral (1)	[1]			Appraisal of collateral (1)
Unobservable Input				Appraisal adj.	Disposal costs			Disposal costs (2)	[2]		Appraisal adj.	Disposal costs
Discount Rate													0.00%	(10.00%)	(10.00%)	(40.00%)	(8.00%)	0.00%	(10.00%)	(5.00%)	(40.00%)	(8.00%)	0.00%	(10.00%)	(7.00%)	(40.00%)	(8.00%)

[1] Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level 3 inputs which are not identifiable.

[2] Appraisals may be adjusted by management for qualitative factors and disposal costs. The range and weighted average of disposal costs are presented as a percent of the appraisal.