Premises and Equipment (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Depreciation	$ 3,416,000	$ 3,436,000	$ 3,403,000
Operating Leases, Rent Expense, Net	$ 1,200,000	$ 669,000	$ 465,000