Securities (Details Textual) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Other Comprehensive Income Loss Available For Sale Securities Tax	$ 85,000	$ 188,000	$ 481,000	$ 546,000
Gross Unrealized Losses	(3,204,000)		(3,204,000)		(3,175,000)
Total available for sale securities	250,057,000		250,057,000		198,746,000
Provision for Other Credit Losses	1,500,000	1,500,000	1,500,000	1,500,000
Condition For Prepayment Of Obligation Before Phase Out Period As Per Dodd Frank Act			greater than $15 billion
Accumulated Other-Than-Temporary Impairment [Member]
Available For Sale Debt Securities Pooled Trust Prefrred Securities Amortized Cost Basis	4,000,000		4,000,000
Total available for sale securities	1,700,000		1,700,000		1,600,000
Collateralized Debt Obligations [Member]
Available For Sale Securities Estimated Amount Of Loss Percentage Default Risk Maximum	100.00%		100.00%
Available For Sale Securities Estimated Amount Of Loss Percentage Default Risk Minimum	5.00%		5.00%
Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Other Default Rate After Year Four	0.40%		0.40%
Gross Unrealized Losses	$ 3,100,000		$ 3,100,000