Investment Securities, Gain Loss And Other Disclosures (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Gain (Loss) on Investments [Line Items]
Number of investment securities held	346
Number of loss positions less than twelve months	47
Number of loss positions in twelve months or more	4
Securities pledged to secure public deposits, FHLB borrowings, and other government agency deposits as required by law	$ 332,000,000	$ 334,800,000
Government Agency Government Sponsored Entities [Member]
Gain (Loss) on Investments [Line Items]
Unrealized losses	0	0	0
Mortgage Backed Securities [Member]
Gain (Loss) on Investments [Line Items]
Unrealized losses	5,400,000	7,600,000	1,300,000
Obligations of States and Political Subdivisions [Member]
Gain (Loss) on Investments [Line Items]
Period for which financial problems are experienced by certain municipalities	6 years
Percentage of bank qualified municipal bond portfolio rated (in hundredths)	93.00%
Percentage of portfolio not rated (in hundredths)	7.00%
Unrealized losses	257,000	627,000	22,000
Corporate Securities [Member]
Gain (Loss) on Investments [Line Items]
Unrealized losses	$ 63,000	$ 147,000	$ 39,000