Business Combinations (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended
	Jun. 30, 2009	Dec. 31, 2011	Dec. 31, 2010
Business Combinations [Abstract]
Allowance for Loan and Lease Losses, Write-offs	$ 7,816
Business Acquisition, Purchase Price Allocation, Goodwill Amount	3,400
Goodwill, Impairment Loss		$ 1,500	$ 1,900